Subtract 16/21 from 20/63
20/63 - 16/21 is -4/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
16/21 = 16 × 3/21 × 3 = 48/63 - Subtract the two like fractions:
20/63 - 48/63 = 20 - 48/63 = -28/63 - After reducing the fraction, the answer is -4/9
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