Subtracting Fractions with Like Denominators Math Example 4

Follow the full solution, then compare it with the other examples linked below.

Example 4

hard
You need 138\frac{13}{8} cups of milk for a recipe, but only have 58\frac{5}{8} of a cup. How much more milk do you need? Express your answer as a mixed number.

Solution

  1. 1
    Subtract: 138−58=88=1\frac{13}{8} - \frac{5}{8} = \frac{8}{8} = 1.
  2. 2
    You need exactly 11 more cup of milk.

Answer

1 cup1 \text{ cup}
Subtracting fractions with a common denominator can sometimes produce a whole number when the numerators differ by exactly the denominator. Always check whether the result simplifies to a whole number.

About Subtracting Fractions with Like Denominators

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

Learn more about Subtracting Fractions with Like Denominators →

More Subtracting Fractions with Like Denominators Examples

Example 1 easy

Subtract [formula].

Example 2 medium

A board is [formula] of a metre long. A piece of [formula] of a metre is cut off. What length remain

Example 3 easy

Compute [formula].

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