How to convert decimals into exact values? can actually the casio calculator work it out? for example : converting 1.570796327 to π/2

or just converting the π into the decimal value or vise versa.

Hello,

No the calculator cannot do that.

But if you do [2nd][Pi] [EXE] then just after [2nd][tan-1][2nd][Ans] you get 1. If you use the inverse trigonometric functions you will never have a value such as pi/4 or pi or pi/2. If angle unit is set to degrees you recover the exact values of the angles (they are integers anyway.

Hope it helps.

Posted on Sep 19, 2009

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

A fraction is itself a value. If you want its decimal representation perform the division. On the Casio FX99ES, you can convert a fraction to its decimal representation by pressing the S<=>D key.

Jul 27, 2014 | Casio FX991ES Scientific Calculator 403...

Here is a sample of the percentage calculations that the calculator can perform. You will not see among them the conversion from decimals to percentages.

To convert from decimals to percents move the decimal mark 2 places to the right and append the % sign.

To convert from percents to decimals, move the decimal mark 2 places to the left.

To convert from decimals to percents move the decimal mark 2 places to the right and append the % sign.

To convert from percents to decimals, move the decimal mark 2 places to the left.

Sep 28, 2013 | Casio FX-82MS Scientific Calculator

I am not sure there is a question expressed here. If you have a formula you want to use to calculate some quantity in it, state the formula, provide the known values and we will show you how to enter it. As to what it serves for, I for one do not need to know.

Sep 29, 2011 | Casio FX-300MS Calculator

The following examples will demonstrate how to
convert decimals into fractions using the TI-30Xa and TI-30Xa Solar.
Please be aware that TI-30Xa Solar School Edition calculators do not
have this functionality.

**Example**: Convert .25 to 1/4

- Input .25, press [2nd][<--] (says F<>D above it).

**** F<>D means fraction to decimal, decimal to fraction. **

**Example**: Convert 1.38 to 1_19/50

- Input 1.38, press [2nd][<--].

**Example**: Convert 9.75 to 9_3/4

- Input 9.75, press [2nd]{<--].

- Input .25, press [2nd][<--] (says F<>D above it).

- Input 1.38, press [2nd][<--].

- Input 9.75, press [2nd]{<--].

Mar 08, 2011 | Texas Instruments TI-30XA Calculator

In MthIO mode the calculator always try to display the exact rational answer if possible.

To convert a single value to decimal, press the S--D key. To have all results come out in decimal, press SHIFT MODE 2 to select the LineIO mode.

To convert a single value to decimal, press the S--D key. To have all results come out in decimal, press SHIFT MODE 2 to select the LineIO mode.

Oct 30, 2010 | Casio FX-115ES Scientific Calculator

Use the key above the ENG key to enter a value in DMS form, ending each portion with the key. To convert it to decimal, press SD once (or twice if you get a fraction the first time).

Example: sine of 12 degrees 15 minutes:

sin 12 *** 15 *** =

where *** is the DMS key.

Example: sine of 12 degrees 15 minutes:

sin 12 *** 15 *** =

where *** is the DMS key.

Sep 25, 2010 | Casio FX-115ES Scientific Calculator

You can always convert a fraction to a decimal. The reverse may not alwas be possible.

Look at the example on the screen capture.

Look at the example on the screen capture.

May 12, 2010 | Casio FX-260 Calculator

Hello,

When you have a fraction output, press the [S<->D] key to convert to decimal, the same key to convert from decimal to fraction. Beware that fraction results are exact, while decimal values are approximate.

However if you cannot stand the sight of a fraction, there is a way to get rid of this type of output.

Here is how you do it.

[SHIFT][MODE][2:LineIO]. All your results will be in decimal. However you will lose a lot of functionalities, such as calculating the logarithm in any base, manipulating radicals.

My advice, if you allow, is to activate the [SHIFT][MODE][1:MathIO] and press the [S<->D] whenever you want a result (be it a fraction or radical) in decimal format.

Hope it helps.

When you have a fraction output, press the [S<->D] key to convert to decimal, the same key to convert from decimal to fraction. Beware that fraction results are exact, while decimal values are approximate.

However if you cannot stand the sight of a fraction, there is a way to get rid of this type of output.

Here is how you do it.

[SHIFT][MODE][2:LineIO]. All your results will be in decimal. However you will lose a lot of functionalities, such as calculating the logarithm in any base, manipulating radicals.

My advice, if you allow, is to activate the [SHIFT][MODE][1:MathIO] and press the [S<->D] whenever you want a result (be it a fraction or radical) in decimal format.

Hope it helps.

Oct 06, 2009 | Casio FX-115ES Scientific Calculator

Hello,

No the calculator cannot convert decimal values into excat values.

Hope it helps.

No the calculator cannot convert decimal values into excat values.

Hope it helps.

Nov 09, 2008 | Casio CFX 9850GA Plus Calculator

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