How do you add fractions with different denominators?

Find the least common denominator (LCD), convert each fraction, then add the numerators. Our calculator does it instantly.

What is a simplified fraction?

A fraction in lowest terms where numerator and denominator share no common factors other than 1. For example, 2/4 simplifies to 1/2.

Arithmetic & Rational Numbers

Add, subtract, multiply, or divide fractions. Get simplified results and decimal equivalents – instantly.

simplified

Decimal value

0.00

As mixed number

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Find the least common denominator (LCD), convert each fraction, then add numerators. Our calculator automates this – try 1/4 + 1/2 = 3/4.

Multiply numerators together and denominators together, then simplify. Example: 2/3 × 3/5 = 6/15 = 2/5.

Multiply by the reciprocal of the second fraction. 3/4 ÷ 1/2 = 3/4 × 2/1 = 6/4 = 3/2.