Question about Texas Instruments TI-89 Calculator

Re: fraction problem

Go into MODE to the second page. In Exact/Approximate, change it to Approx instead of Auto or Exact. This will give you decimals instead of fractions.

Posted on Nov 19, 2007

Use this http://www.calculatorsoup.com/calculators/math/percent-to-fraction-calculator.php

**OR** to work it out yourself.....#

### How to convert percent to fraction

1% = 1/100

So in order to convert percent to fraction, divide the percent by 100% and reduce the fraction.

For example 56% is equal to 56/100 with gcd=4 is equal to 14/25:

56% = 56/100 = 14/25

- Divide the percent by 100 to get decimal number.
- Count the number of digits (d) to the right of the decimal point of the decimal number.Example: 2.56 has 2 digits to the right of the decimal point, so d=2.
- Calculate the factor (f) for making the decimal number an integer:
*f*= 10*to power d*

Example:

*f*= 10 power 2 = 100

- Multiply and divide the decimal number x by the factor f:
*x***f*/*f*=*y*/*f*

Example:

2.56 * 100 / 100 = 256 / 100

- Find the greatest common divisor (gcd) of the fraction.
Example:

gcd(256,100) = 4

- Reduce the fraction by dividing the numerator and denominator by the gcd value:
Example:

256 / 100 = (256/4) / (100/4) = 64/25

1% = 1/100

So in order to convert percent to fraction, divide the percent by 100% and reduce the fraction.

For example 56% is equal to 56/100 with gcd=4 is equal to 14/25:

56% = 56/100 = 14/25

Sep 07, 2014 | Calculators

To change from fraction to decimal, all it takes is a keypress. (change key)

.Not all decimal results (approximations) will be converted to fractions.

Anyway, if you want to set the calculator to display decimal results only,

Press SETUP

Press 2:EDITOR

Select 1:LINE.

.Not all decimal results (approximations) will be converted to fractions.

Anyway, if you want to set the calculator to display decimal results only,

Press SETUP

Press 2:EDITOR

Select 1:LINE.

Jan 30, 2011 | Sharp ELW535 Calculator

To convert a single result from fraction to decimal, press SD. To have all results come out in decimal, press SHIFT MODE 2 to select LineIO mode.

Sep 26, 2010 | Casio fx-300ES Calculator

There is no key nor command to calculate percentages. But that is easy to correct.

Percentages

To go from a decimal result to a percentage, move the decimal mark 2 places to the right. If you have no decimal mark as with integers, put a decimal mark at the end of the number pad it with zeros, then move the decimal mark 2 places to the right.

Ex: 0.73 in % gives 73.0%

Ex: 2.33 in % gives 233.00 %

Ex: 5 in % 5=5.00 becomes 500%

Fractions

The calculators has a command to convert a decimal number to a fraction. The command is called >Frac or To frac. You find it under the MATH key.

Enter a number (decimal or fraction)

Press [MATH][1:>Frac]

Command echoes on main screen after the number you entered.

Press [ENTER] the result is displayed as a fraction.

The TI 84PLUS and TI84PLUS Silver edition OS has seen a major upgrade to version 2.53 M(ath)P(rint). If you play a lot with fractions this new OS will allow you to do a lot more than what is described above.

Here is the link to download the new OS version. It cannot be transferred to a TI83PLUS or TI83PLUS SE.

Percentages

To go from a decimal result to a percentage, move the decimal mark 2 places to the right. If you have no decimal mark as with integers, put a decimal mark at the end of the number pad it with zeros, then move the decimal mark 2 places to the right.

Ex: 0.73 in % gives 73.0%

Ex: 2.33 in % gives 233.00 %

Ex: 5 in % 5=5.00 becomes 500%

Fractions

The calculators has a command to convert a decimal number to a fraction. The command is called >Frac or To frac. You find it under the MATH key.

Enter a number (decimal or fraction)

Press [MATH][1:>Frac]

Command echoes on main screen after the number you entered.

Press [ENTER] the result is displayed as a fraction.

- If the number entered or stored in answer memory is a decimal number it will be converted to a fraction.
- If the number you entered is a fraction, the result will be displayed as a fraction but REDUCED to its simplest terms.
- For example 6/9 becomes 2/3

The TI 84PLUS and TI84PLUS Silver edition OS has seen a major upgrade to version 2.53 M(ath)P(rint). If you play a lot with fractions this new OS will allow you to do a lot more than what is described above.

Here is the link to download the new OS version. It cannot be transferred to a TI83PLUS or TI83PLUS SE.

Aug 07, 2010 | Texas Instruments TI-84 Plus Silver...

If your calculator is configured to be in MthIO, the fraction that is displayed is always reduced to its simplest form. (The denominator is the smallest possible.)

If you are adding fractions, the result is also a fraction in its reduced form.

If you want to convert a fraction to a decimal number, press the [S<=>D] key.

To set MthIO: Press [SHIFT][MODE] (SetUp) and select [1:MthIO]

To set LineIO: Press [SHIFT][MODE](SetUp) and select [2:LineIO]

In LineIO, all results are expressed in decimal format.

If you are adding fractions, the result is also a fraction in its reduced form.

If you want to convert a fraction to a decimal number, press the [S<=>D] key.

To set MthIO: Press [SHIFT][MODE] (SetUp) and select [1:MthIO]

To set LineIO: Press [SHIFT][MODE](SetUp) and select [2:LineIO]

In LineIO, all results are expressed in decimal format.

Jan 26, 2010 | Casio FX-115ES Scientific Calculator

The calculator has two Input/Output modes, MthIO and LineIO. In MthIO the results are displayed as fractions or as radicals or a mixture of fractions and radicals. What it means, is that in MthIO the calculator does exact calculations. Radicals in denominators are gotten rid of by rationalization, fractions are reduced to the same denominators before addition or subtraction. Fractions are reduced to simplest form.

In LineIO all results are displayed as decimal numbers.

If a result is exact (fractions and radicals) it can be changed to decimal form by pressing the S To D key, the one above the DEL key.

MthIO is the default IO mode. To set it, press SHIFT MODE and select 1:MthIO. To set LineIO as the IO mode, press SHIFT MODE and select 2:LineIO

In LineIO all results are displayed as decimal numbers.

If a result is exact (fractions and radicals) it can be changed to decimal form by pressing the S To D key, the one above the DEL key.

MthIO is the default IO mode. To set it, press SHIFT MODE and select 1:MthIO. To set LineIO as the IO mode, press SHIFT MODE and select 2:LineIO

Jan 20, 2010 | Casio FX-115ES Scientific Calculator

Hello,

Ther e is no dedicated key to do that but ther is a command ToFrac noted as ->Frac. To access it use [MATH[1:->Frac].

Two ways of using the command.

1. You want to reduce a fraction to its simplest expression

27/48 [MATH][1:->Frac] [ENTER] gives the reduced fraction 9/16

2 You do not want your results converted to decimal numbers

(27/48) [x] (5/7) [MATH][1:->Frac][ENTER] multiplies the two fractions and gives a fraction as a result. 45/112

3. Your result is in decimal form and you want to cast it into a fraction. The conversion will be exact only for certain numbers. Results kept in fraction forms are more accurate than those represented as decimals.

Hope it answers your question.

Ther e is no dedicated key to do that but ther is a command ToFrac noted as ->Frac. To access it use [MATH[1:->Frac].

Two ways of using the command.

1. You want to reduce a fraction to its simplest expression

27/48 [MATH][1:->Frac] [ENTER] gives the reduced fraction 9/16

2 You do not want your results converted to decimal numbers

(27/48) [x] (5/7) [MATH][1:->Frac][ENTER] multiplies the two fractions and gives a fraction as a result. 45/112

3. Your result is in decimal form and you want to cast it into a fraction. The conversion will be exact only for certain numbers. Results kept in fraction forms are more accurate than those represented as decimals.

Hope it answers your question.

Oct 10, 2009 | Texas Instruments TI-83 Plus Calculator

Hello,

Press [MATH][1:ToFrac] to convert an aswer to fraction.

If you enter 18.52[ToFrac] [ENTER gives 463/25

[MATH][2:ToDEC] converts a fraction to a decimal number.

Hope it helps.

Press [MATH][1:ToFrac] to convert an aswer to fraction.

If you enter 18.52[ToFrac] [ENTER gives 463/25

[MATH][2:ToDEC] converts a fraction to a decimal number.

Hope it helps.

Sep 22, 2009 | Texas Instruments TI-84 Plus Silver...

You can always convert a fraction to a decimal. The reverse may not
always be possible. Look at the example on the screen capture.

You may be lucky and recover a fraction you have just converted into decimal format, but you cannot just write 0.333333333333 and expect the calculator to convert it to 1/3: The true fraction 1/3 has an infinite number of 3's after the decimal mark.

You may be lucky and recover a fraction you have just converted into decimal format, but you cannot just write 0.333333333333 and expect the calculator to convert it to 1/3: The true fraction 1/3 has an infinite number of 3's after the decimal mark.

Jan 06, 2009 | Casio FX-260 Calculator

Enter the fraction for example: enter 8/12.

The answer will be .666666

Then click Math (which is located under the Alpha button).

Click the ->Frac button (the first one).

It should come up as Ans->Frac.

Click Enter.

It should now read 2/3 which is 8/12 reduced.

Note: I have a TI-84 Plus Silver Edition, and the TI-84 Plus might not have this function, but that is how I do it on my TI-84 Plus Silver Edition

The answer will be .666666

Then click Math (which is located under the Alpha button).

Click the ->Frac button (the first one).

It should come up as Ans->Frac.

Click Enter.

It should now read 2/3 which is 8/12 reduced.

Note: I have a TI-84 Plus Silver Edition, and the TI-84 Plus might not have this function, but that is how I do it on my TI-84 Plus Silver Edition

Nov 08, 2008 | Calculators

405 people viewed this question

Usually answered in minutes!

When I get an answer of 3/8 how will I turn that into a decimal?

Same problem but the answer has already been solved.. thanks!

×