Practice Subtracting Fractions with Like Denominators in Math

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

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Quick Recap

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

You have 58\frac{5}{8} of a cake and eat 28\frac{2}{8}. Same size slices, so subtract the count: 38\frac{3}{8} remains.

Showing a random 20 of 50 problems.

Example 1

medium
1013−?13=413\frac{10}{13}-\frac{?}{13}=\frac{4}{13}. Find the missing numerator.

Example 2

challenge
For which whole number kk does k9−29\frac{k}{9}-\frac{2}{9} simplify to 13\frac{1}{3}?

Example 3

medium
A board is 912\frac{9}{12} of a metre long. A piece of 512\frac{5}{12} of a metre is cut off. What length remains?

Example 4

challenge
Half a pizza (48\frac{4}{8}) is left. Sam eats 38\frac{3}{8} of the whole pizza. Express what is left of the whole, and of the original half.

Example 5

easy
1516−716=□\frac{15}{16} - \frac{7}{16} = \square

Example 6

medium
Subtract 315−1453\frac{1}{5}-1\frac{4}{5}.

Example 7

hard
Subtract 219−892\frac{1}{9} - \frac{8}{9} and write as a mixed number.

Example 8

easy
Subtract 58−28\frac{5}{8}-\frac{2}{8}.

Example 9

medium
Find 1315−415−215\frac{13}{15} - \frac{4}{15} - \frac{2}{15}.

Example 10

easy
Subtract 79−49\frac{7}{9}-\frac{4}{9}.

Example 11

easy
Subtract 710−310\frac{7}{10} - \frac{3}{10}.

Example 12

easy
Subtract 67−27\frac{6}{7}-\frac{2}{7}.

Example 13

medium
A pitcher holds 1112\frac{11}{12} L of juice. Maya pours out 512\frac{5}{12} L. How much remains?

Example 14

medium
Subtract 198−78\frac{19}{8} - \frac{7}{8} and write as a mixed number.

Example 15

challenge
Subtract 5211−2711−13115\frac{2}{11} - 2\frac{7}{11} - 1\frac{3}{11}.

Example 16

easy
Maya has 710\frac{7}{10} of a chocolate bar. She gives 210\frac{2}{10} to her brother. How much does she have left?

Example 17

medium
Subtract 4310−17104\frac{3}{10} - 1\frac{7}{10}.

Example 18

medium
A jug holds 11 L. Maya drinks 38\frac{3}{8} L. Then her friend drinks 18\frac{1}{8} L. How much is left in the jug?

Example 19

easy
Subtract 34−14\frac{3}{4}-\frac{1}{4}.

Example 20

medium
Subtract 1−591 - \frac{5}{9}.
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