Subtract 12/14 from 15/21
15/21 - 12/14 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
12/14 = 12 × 3/14 × 3 = 36/42 - Subtract the two like fractions:
30/42 - 36/42 = 30 - 36/42 = -6/42 - After reducing the fraction, the answer is -1/7
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