Subtract 20/60 from 15/63
15/63 - 20/60 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 60 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
15/63 = 15 × 20/63 × 20 = 300/1260 - Likewise, for the 2nd fraction, since 60 × 21 = 1260,
20/60 = 20 × 21/60 × 21 = 420/1260 - Subtract the two like fractions:
300/1260 - 420/1260 = 300 - 420/1260 = -120/1260 - After reducing the fraction, the answer is -2/21
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