Fraction Calculator
Add, subtract, multiply and divide fractions with simplification.
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About this calculator
Fractions keep exactness where decimals round — 1/3 stays 1/3, not 0.333.
Formula
a/b ± c/d = (ad ± cb)/bd; × and ÷ via cross-multiplication, then divide by GCD.
Frequently Asked Questions
Why simplify?
Dividing numerator and denominator by their GCD gives the lowest-terms form, easiest to read.