Subtract 21/24 from 5/28, Solve 5/28

Subtract 21/24 from 5/28

5/28 - 21/24 is -39/56.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 24 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 28 × 6 = 168,
5/28 = 5 × 6/28 × 6 = 30/168
Likewise, for the 2nd fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168
Subtract the two like fractions:
30/168 - 147/168 = 30 - 147/168 = -117/168
After reducing the fraction, the answer is -39/56

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