Practice Subtracting Fractions with Like Denominators in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

Subtracting fractions that share the same denominator by subtracting the numerators and keeping the denominator.

You have \frac{5}{8} of a cake and eat \frac{2}{8}. Same size slices, so subtract the count: \frac{3}{8} remains.

Example 1

easy
Subtract \frac{7}{10} - \frac{3}{10}.

Example 2

medium
A board is \frac{9}{12} of a metre long. A piece of \frac{5}{12} of a metre is cut off. What length remains?

Example 3

easy
Compute \frac{11}{15} - \frac{4}{15}.

Example 4

hard
You need \frac{13}{8} cups of milk for a recipe, but only have \frac{5}{8} of a cup. How much more milk do you need? Express your answer as a mixed number.
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