Subtract 15/4 from 21/72
1st number: 21/72, 2nd number: 3 3/4
21/72 - 15/4 is -83/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 4 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 4 × 18 = 72,
15/4 = 15 × 18/4 × 18 = 270/72 - Subtract the two like fractions:
21/72 - 270/72 = 21 - 270/72 = -249/72 - After reducing the fraction, the answer is -83/24
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