Fractions

To add or subtract fractions, first rewrite them with a common denominator (LCD), then add or subtract the numerators.

To divide by a fraction, multiply by its reciprocal — flip the second fraction and multiply.

Two fractions are equivalent when they represent the same value. Multiply or divide both the numerator and denominator by the same non-zero number.

Multiply fractions by multiplying numerator by numerator and denominator by denominator. No common denominator needed.

How to subtract fractions with the same and different denominators, including mixed numbers.