Subtract 7/20 from 21/63
21/63 - 7/20 is -1/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
21/63 = 21 × 20/63 × 20 = 420/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
7/20 = 7 × 63/20 × 63 = 441/1260 - Subtract the two like fractions:
420/1260 - 441/1260 = 420 - 441/1260 = -21/1260 - After reducing the fraction, the answer is -1/60
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