Subtract 16/20 from 42/63
42/63 - 16/20 is -2/15.
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,
42/63 = 42 × 20/63 × 20 = 840/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
16/20 = 16 × 63/20 × 63 = 1008/1260 - Subtract the two like fractions:
840/1260 - 1008/1260 = 840 - 1008/1260 = -168/1260 - After reducing the fraction, the answer is -2/15
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