Subtract 54/60 from 21/56
21/56 - 54/60 is -21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 60 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
21/56 = 21 × 15/56 × 15 = 315/840 - Likewise, for the 2nd fraction, since 60 × 14 = 840,
54/60 = 54 × 14/60 × 14 = 756/840 - Subtract the two like fractions:
315/840 - 756/840 = 315 - 756/840 = -441/840 - After reducing the fraction, the answer is -21/40
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