Subtract 21/63 from 6/20
6/20 - 21/63 is -1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
6/20 = 6 × 63/20 × 63 = 378/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
21/63 = 21 × 20/63 × 20 = 420/1260 - Subtract the two like fractions:
378/1260 - 420/1260 = 378 - 420/1260 = -42/1260 - After reducing the fraction, the answer is -1/30
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