Subtract 21/12 from 15/24
1st number: 15/24, 2nd number: 1 9/12
15/24 - 21/12 is -9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 24 × 1 = 24,
15/24 = 15 × 1/24 × 1 = 15/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
21/12 = 21 × 2/12 × 2 = 42/24 - Subtract the two like fractions:
15/24 - 42/24 = 15 - 42/24 = -27/24 - After reducing the fraction, the answer is -9/8
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