Subtract 21/14 from 7/15
1st number: 7/15, 2nd number: 1 7/14
7/15 - 21/14 is -31/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 14 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
7/15 = 7 × 14/15 × 14 = 98/210 - Likewise, for the 2nd fraction, since 14 × 15 = 210,
21/14 = 21 × 15/14 × 15 = 315/210 - Subtract the two like fractions:
98/210 - 315/210 = 98 - 315/210 = -217/210 - After reducing the fraction, the answer is -31/30
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