Question about Texas Instruments TI-86 Calculator

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Decimals to fractions

I am trying to use the ti-86 to do fractions but my answers come back decimals how do I get them to become fractions again?

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  • Anonymous Apr 17, 2009




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Use the [2nd][MATH] keys. Scroll right [F6] to the softmenu [->Frac or To Frac].
Hope it helps.

Posted on Sep 23, 2009


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1 Answer

How do I convert fractions to decimals on a TI-86 calculator?

Just divide the numerator by the denominator. For example, to convert 1/4 to decimal, press 1 / 4 ENTER and see .25

Sep 15, 2014 | Texas Instruments TI-86 Calculator

1 Answer

0.32 repeation decimal into a fraction

You can convert a decimal value to a fraction by using the >FRAC command in the MATH MISC menu. Be aware that this command will not work on all values.

Oct 26, 2010 | Texas Instruments TI-86 Calculator

1 Answer

I can't convert a decimal to a fraction. When I follow the directions I dont have a frac button...mine say num and then under it sum

From the MATH menu (when it says num and under it sum), press NEXT. You'll then see the >FRAC command which tries to convert a decimal to a fraction.

Aug 25, 2010 | Texas Instruments TI-86 Calculator

1 Answer

Not sure on how to get a decimal into a fraction on the TI 86

The >Frac command on the second page of the the MATH/Misc menu will display the current value as a fraction.

Aug 12, 2010 | Texas Instruments TI-86 Calculator

1 Answer

Hey , how can i do percentage and fractions on the ti 84 plus silver edition ? Thxxx :D

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

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%

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.
  1. If the number entered or stored in answer memory is a decimal number it will be converted to a fraction.
  2. If the number you entered is a fraction, the result will be displayed as a fraction but REDUCED to its simplest terms.
  3. For example 6/9 becomes 2/3
OS version 2.53MP

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...

1 Answer


Because the TI84 does supports fractions in a funny way. Tap (3/4+1/2) then tap MATH and tap ENTER twice and you get the answer 5/4.
The TI 89 has a MODE called exact/approximate. In the exact MODE it does fractions; 3/4 + 1/2 = 5/4. In the approximate MODE it does decimals; 3/4 + 1/2 = 1.25

Nov 27, 2009 | Texas Instruments TI-86 Calculator

1 Answer

TI-89 decimal to fraction

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.

Nov 15, 2009 | Texas Instruments TI-89 Calculator

1 Answer

How do I do a fraction with the Texas Instruments TI-86?


If I am guessing correctly, you want to convert a decimal number into a fraction. In the TI86 you do as follows
1. Press [MATH] you get a set of menus. By pressing right arrow you can scroll through the list.
2. Look for submenu [MISC] and press the function key. Under that submenu there is a long list SUM, PROD, etc. Press the right arrow to travel down the list until you find Frac preceded by a fat arrow.

To convert a decimal number you enter it, then you travel down the MATH menu until you reach the ToFrac menu. You press the function key under the menu and you get your fraction, reduced to its simplest form.

Hope it helps.

Aug 12, 2009 | Texas Instruments TI-86 Calculator

1 Answer

Multiplication error(?) with repeating decimal place fractions.

You may have guessed right. The presence of the parentheses makes the content of the parentheses evaluated first. So there is a loss of precision.
On the Ti92 I do 7*(-1/7)+1 and find 0.
But with Floating mode set at 12 decimal digits I get
Then .142857142857.*(-7) + 1 gives 2E-14.
Try to calculate pi*(-1/pi) +1 or e*(1/e)+1.
Hope it answers your question.

Sep 29, 2008 | Texas Instruments TI-86 Calculator

1 Answer


When performing the calculations, put the fractions in parentheses. Then once you get your answer, press 2nd and Math (above the times button). Then press F5, MORE, and F1. It will have Ans Frac>. Then hit Enter and it'll change it to a fraction.

Feb 03, 2008 | Texas Instruments TI-86 Calculator

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