Subtract 15/14 from 21/84
1st number: 21/84, 2nd number: 1 1/14
21/84 - 15/14 is -23/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 14 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Likewise, for the 2nd fraction, since 14 × 6 = 84,
15/14 = 15 × 6/14 × 6 = 90/84 - Subtract the two like fractions:
21/84 - 90/84 = 21 - 90/84 = -69/84 - After reducing the fraction, the answer is -23/28
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