Fraction Calculator
Add, subtract, multiply, and divide fractions with automatic simplification.
Add, subtract, multiply, or divide two fractions and get the answer simplified to lowest terms, plus the decimal equivalent. Type fractions like 1/2 and 3/4 — the calculator finds common denominators and reduces the result automatically.
How it's calculated
Addition and subtraction use a common denominator (a/b ± c/d = (ad ± bc)/bd); multiplication multiplies straight across; division flips the second fraction and multiplies. Every answer is reduced with the greatest common divisor.
Frequently asked questions
How do I add 1/2 + 1/4?
Enter 1/2 and 1/4 with the Add operation — the answer is 3/4 (0.75). The calculator converts both to quarters, then adds.
Does it simplify the answer?
Yes. Every result is reduced to lowest terms automatically — for example 2/3 × 3/4 = 6/12 is shown as 1/2.
Can I divide fractions?
Yes. Division flips the second fraction and multiplies: 1/2 ÷ 1/4 = 1/2 × 4/1 = 2.