How to turn a decimal into a fraction on a TI-84 Plus CE

By E-Code · updated 2026-09-27

Type the decimal, press MATH, ▶ four times to FRAC, 3 for ►F◄►D and ENTER: .375 becomes 3/8. MATH 2 (►Dec) and ENTER turn the answer back into a decimal.

Step by step

1. Type a decimal. . 3 7 5 Type .375.
2. Open MATH. MATH Press MATH. Its tabs run along the top: MATH NUM CMPLX PROB FRAC.
3. Go to the FRAC tab. ▶ ▶ ▶ ▶ Press ▶ four times to reach FRAC, the fraction tools.
4. Pick ►F◄►D. 3 Press 3 for ►F◄►D, fraction ◄► decimal. It flips a number from one form to the other.
5. Get the fraction. ENTER Press ENTER.
6. Back to MATH. MATH Press MATH again. The first tab, MATH, has ►Dec as item 2.
7. Pick ►Dec. 2 Press 2. On a new line the calculator writes Ans►Dec: your last answer, 3/8, as a decimal.
8. Back to a decimal. ENTER Press ENTER.
9. Both ways. .375 is 3/8. ►F◄►D gives the fraction when there is one, and ►Dec turns a fraction back into a decimal.

What the screen shows

.375 is 3/8. ►F◄►D gives the fraction when there is one, and ►Dec turns a fraction back into a decimal.

Look for Ans►Dec .375 on the screen.

Try it with the keys lit up

This guide is one of E-Code's Learn lessons. Open it on E-Code's TI-84 calculator and each key lights up in turn as you press it.

Try “Turn a decimal into a fraction” on the TI-84 calculator

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