Question about Texas Instruments TI-89 Calculator

# TI-89 decimal to fraction

My answers only come up in decimals but i want to get them in fraction form...what do i need to change?

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Here is what you do:

1) Press the Mode button.
2) Scroll down the list that appears until you find "Exact/Approx".
3) Change the setting for "Exact/Approx" to Exact.
4) Press enter to save the settings change.

You have three possible settings for "Exact/Approx":
1) Auto - The calculator will try to determine the best format.
2) Exact - The calculator will always give the answer in fraction form.
3) Approximate - The calculator will always give the answer in decimal form.

Posted on Nov 16, 2009

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Posted on Jan 02, 2017

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## Related Questions:

### Convert decimal fraction to binary

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.

Jan 27, 2012 | Texas Instruments TI-89 Calculator

### How do i convert a decimal answer to fraction format on a TI 89 titanium.... prefferably with matrixes

It is just a matter of being in EXACT mode. To set your calculator in EXACT mode here's the key sequence. Press [MODE] [F3] [Up Arrow] [Up Arrow] [Right Arrow] [2] [ENTER]. Now when your in the Matrix Editor you can input your numbers in decimal form and, they will be automatically be converted to a fractional format. Pictured below is a matrix that was entered using decimal numbers and, was converted into factional form. Notice at the bottom of the screen the calculator is in EXACT mode.

Here's the same matrix in the HOME screen.

Next is the same matrix converted back to decimal numbers. Notice at the bottom of the screen the calculator is in APPROX mode.

And of course when I turn the calculator back to EXACT mode and, Re-ENTER the decimal formatted matrix in the HOME screen the fractional formatted matrix reappears.

You can use the propFrac( command but, having in the EXACT mode setting works better.

Dec 06, 2010 | Texas Instruments TI-89 Calculator

### My ti-89 will only give me a fraction instead of a decimal answer

If you want to convert a single value, press Diamond then ENTER.

If you want them all in decimal, press MODE, scroll down to Exact/Approx, and change the setting to suit.

Jun 08, 2010 | Texas Instruments TI-89 Calculator

### When I divide the answer is in fraction form not decimal form how do i get it back

There are two options.

1) Whenever you want the answer in decimal form, place a decimal after at least one of the numbers.
For example: instead of using (1/2) use (1/2.)

2) Press the "Mode" button. Scroll down the list that appears until you find "Exact/Approx". If you set it to "Approximate", then it will always give the answer in decimal form. If you set it to "Exact", it will give the answer in fraction form.

Nov 12, 2009 | Texas Instruments TI-89 Calculator

### How do I change the settings to get my answers in

if you hit the diamond key before enter you will always get your solution as a decimal

Sep 08, 2009 | Texas Instruments TI-89 Calculator

### Reset calcuator

try this, press shift mode, then line 10. It will make it permanent. the answer will always be in decimals. if you are using a casio with ES models.

Jun 14, 2009 | Office Equipment & Supplies

### My answers are always in fraction form!!!

go to mode and scroll down to exact/approx, exact will give fractions, approximate will give decimal, change it to approximate and press enter twice to save it, that should solve it, let me know of any other questions that you may have

Mar 21, 2008 | Texas Instruments TI-89 Calculator

### I want the answer to be in decimal form.

Press "MODE"
then scroll down to "Exact/Approx"
select "approximate"

Oct 16, 2007 | Texas Instruments TI-89 Calculator

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