Subtract 15/24 from 21/72
21/72 - 15/24 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
15/24 = 15 × 3/24 × 3 = 45/72 - Subtract the two like fractions:
21/72 - 45/72 = 21 - 45/72 = -24/72 - After reducing the fraction, the answer is -1/3
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