Question about Texas Instruments TI-85 Calculator

I have a Texal Instrumen TI-85 calculator. I was wondering how to multiply fractions to get answers as fractions and not decimals???

In the CATALOG there is a >Frac command that can be used with parentheses to multiply fractions.

(1/2)(1/3)>Frac

1/6

Posted on Nov 25, 2008

What is 3/4 multiplied by 3 1/3

Posted on Mar 02, 2015

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Posted on Jan 02, 2017

- Make sure you're working with two fractions.
- Multiply numerator x numerator, then multiply denominator x denominator.

- Make sure you're working with two fractions
- Flip the second fraction upside down.
- Change the division sign into a multiplication sign.
- Multiply top x top and bottom x bottom.

- Convert mixed numbers into improper fractions.
- Take the whole (non-fraction) number and multiply it by the denominator.
- Add that answer to the numerator.
- Put that amount over the original denominator and you will have an improper fraction.

- Find the lowest common denominator (bottom number). For both adding and subtracting fractions, you'll start with the same process.
- Multiply fractions to match the lowest common denominator.
- Add or subtract the two numerators (top number) but NOT the denominators.

Mar 07, 2017 | Homework

None of these solutions answer his question. When converting a fraction or any number with decimal places to Binary, the TI-89 gives "Error: Domain error." For example, entering .6875 [2ND][MATH][BASE][BIN] does not work. I haven't found a way to do it with built in functions. In order to do these types of conversions, I use the following method.

Convert: 0.6875 to Binary

- left of decimal is a 0, so write down a 0, then a decimal point: (0.)

- multiply .6875 x 2 = 1.375 left of decimal is 1, write a 1: (0.1)

- drop the 1 and multiply .375 x 2 = .75 left of decimal is 0. write a 0: (0.10)

- multiply .75 x 2 = 1.5 left of decimal is 1, write a 1: (0.101)

- drop the 1, multiple .5 x 2 = 1. left of decimal is 1, write a 1: (0.1011).

- since there is no more fraction, the final answer is (0.1011). Hope this helps.

Convert: 0.6875 to Binary

- left of decimal is a 0, so write down a 0, then a decimal point: (0.)

- multiply .6875 x 2 = 1.375 left of decimal is 1, write a 1: (0.1)

- drop the 1 and multiply .375 x 2 = .75 left of decimal is 0. write a 0: (0.10)

- multiply .75 x 2 = 1.5 left of decimal is 1, write a 1: (0.101)

- drop the 1, multiple .5 x 2 = 1. left of decimal is 1, write a 1: (0.1011).

- since there is no more fraction, the final answer is (0.1011). Hope this helps.

Jan 27, 2012 | Texas Instruments TI-89 Calculator

One can express percentages as fractions. Say you have 60% and you want to change this into a fraction. you can also express this as 60/100 because all percentages are are parts of 100. So to change a fraction into a percent you would just convert the fraction into a decimal by dividing (3/4 = .75). Then to get the percentage you just multiply the decimal by 100 to get the percent. (75x100=75%

May 02, 2011 | Texas Instruments TI-34II Explorer Plus...

The division sign acts like a fraction on the ti-83; to multiply two fractions you may want to wrap them both in parenthesis to get the order of operations correct.

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Sep 24, 2010 | Texas Instruments TI-83 Plus Calculator

put the fractions inside brackets

(1/2) x (44/55)

(1/2) x (44/55)

Feb 23, 2010 | Texas Instruments TI-83 Plus Calculator

Transforming 0.175 to fraction:

= 175/1,000

Reduce to lowest term (divide by 5 both the numerator and the denominator):

= 35/200

Reduce further by dividing both by 5:

= 7/40

This is the lowest terms now that it can't be reduced further.

The "Other" way round, Bottom number into ONE and multiply it by the Top. EG: 3/4 == 1 divided by 4 = 0.25, now we multiply, .25 by the Top number or in this case 3, that equals 0.75. 1/4 =0.25 x 3 = .75. 3/4 is the same as 0.75.

= 175/1,000

Reduce to lowest term (divide by 5 both the numerator and the denominator):

= 35/200

Reduce further by dividing both by 5:

= 7/40

This is the lowest terms now that it can't be reduced further.

The "Other" way round, Bottom number into ONE and multiply it by the Top. EG: 3/4 == 1 divided by 4 = 0.25, now we multiply, .25 by the Top number or in this case 3, that equals 0.75. 1/4 =0.25 x 3 = .75. 3/4 is the same as 0.75.

Feb 22, 2010 | Texas Instruments TI-30XA 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...

Hello,

To convert fractions to decimals or decimals to fractions, you use the [S<->D] key. Each time you press the key the result is displayed in the other format.

Alternatively, If you multiply or divide two integer numbers put a decimal mark at the end of one of the numbers (any one). The result will be displayed in decimal format.

Hope it helps.

To convert fractions to decimals or decimals to fractions, you use the [S<->D] key. Each time you press the key the result is displayed in the other format.

Alternatively, If you multiply or divide two integer numbers put a decimal mark at the end of one of the numbers (any one). The result will be displayed in decimal format.

Hope it helps.

Jun 01, 2009 | Casio FX-115ES Scientific Calculator

You'll find the ->Frac command on the MATH MISC menu.

Mar 09, 2009 | Texas Instruments TI-85 Calculator

Apr 03, 2014 | Texas Instruments TI-85 Calculator

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I'm trying to solve fractions with my calculator but am not sure how to input them any suggestions?

Yes, my daughter found same thing. I think using parens is a workaround, and then there is a function buried in math>misc somewhere.

cross multiply to find equal fraction, or the unknown factor

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