Subtract 20/63 from 16/54
16/54 - 20/63 is -4/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
16/54 = 16 × 7/54 × 7 = 112/378 - Likewise, for the 2nd fraction, since 63 × 6 = 378,
20/63 = 20 × 6/63 × 6 = 120/378 - Subtract the two like fractions:
112/378 - 120/378 = 112 - 120/378 = -8/378 - After reducing the fraction, the answer is -4/189
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