Adding & Subtracting Fractions (with Unlike denominators)

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

The denominator indicates how many equal parts the whole is divided into.

The numerator shows how many parts of the whole are being considered.

Equivalent fractions are different fractions that represent the same value or proportion of the whole.

To find the LCD, list the multiples of each denominator and find the smallest multiple that both denominators share.

24

12

1. Find the least common denominator. 2. Convert each fraction to an equivalent fraction with the LCD. 3. Add the numerators and keep the denominator.

9/10

1. Find the least common denominator. 2. Convert each fraction to an equivalent fraction with the LCD. 3. Subtract the numerators and keep the denominator.