Subtract 21/63 from 15/60
15/60 - 21/63 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
15/60 = 15 × 21/60 × 21 = 315/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
21/63 = 21 × 20/63 × 20 = 420/1260 - Subtract the two like fractions:
315/1260 - 420/1260 = 315 - 420/1260 = -105/1260 - After reducing the fraction, the answer is -1/12
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