Fraction to Decimal Calculator

Divide the numerator by the denominator. For 3/4, divide 3 by 4 to get 0.75. For 1/3, divide 1 by 3 to get 0.333… (a repeating decimal). The result is exact for fractions whose simplified denominator factors into 2s and 5s only; otherwise the decimal repeats.

Convert to a decimal first, then multiply by 100. For 3/4: 3 ÷ 4 = 0.75, then × 100 = 75%. The calculator does both at once and shows the percent row directly.

A fraction has a terminating decimal exactly when its simplified denominator contains only the prime factors 2 and 5. So 1/2, 3/5, 7/8, and 9/20 all terminate. Fractions like 1/3, 2/7, or 5/12 have repeating decimals because the denominator includes other primes (3 or 7 in those cases).

Division by 0 is undefined, so the calculator flags the input and returns no value. Make sure the denominator is a nonzero integer.

The sign attaches to the numerator. -3/4 returns -0.75 and -75%. If both numerator and denominator are negative, the negatives cancel and the result is positive.

Yes. The simplified fraction row shows the input reduced to lowest terms by dividing both numerator and denominator by their greatest common divisor. The decimal value is the same either way, but the simplified form is the standard answer for most homework questions.