Add Fractions Calculator

Use our free add fractions calculator to add two fractions. Get the sum as both a simplified fraction and a decimal value.

Math

First Numerator (A)

First Denominator (B)

Second Numerator (C)

Second Denominator (D)

Formula

Add two fractions together using cross-multiplication: a/b + c/d = (a×d + b×c) / (b×d). The result is automatically simplified to lowest terms.

A/B + C/D = (A×D + B×C) / (B×D)

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

Result: 0.583333 (7/12)

Find the common denominator by multiplying both denominators, cross-multiply the numerators, then add. Simplify the result by dividing by the GCD.

Simply add the numerators and keep the denominator the same. For example, 1/5 + 2/5 = 3/5.

CalculateMe Team

Last updated: 2026-07-13