Subtract 63/84 from 8/20
8/20 - 63/84 is -7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
8/20 = 8 × 21/20 × 21 = 168/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
63/84 = 63 × 5/84 × 5 = 315/420 - Subtract the two like fractions:
168/420 - 315/420 = 168 - 315/420 = -147/420 - After reducing the fraction, the answer is -7/20
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