Add, subtract, multiply and divide fractions, with simplification, decimal value, GCD / LCM helpers and step-by-step working — 100% in your browser.
Result (fraction)
Decimal value
Enter numerator / denominator for two fractions, pick +, −, × or ÷, then Calculate. Result is shown reduced; if the denominator is 1 it is displayed as an integer. Denominator 0 is rejected. Negative fractions and integer inputs (den = 1) are supported. The steps panel shows the LCD rewriting for +/− and the cross-multiplication for ×/÷. All math is local.
Simplify / GCD / LCM
Reduced
GCD
LCM
Decimal
Type a numerator and a denominator and click Simplify to reduce the fraction and see its GCD, LCM and decimal value. Denominator 0 is rejected.