Subtract 63/54 from 21/20
1st number: 1 1/20, 2nd number: 1 9/54
21/20 - 63/54 is -7/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
21/20 = 21 × 27/20 × 27 = 567/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
63/54 = 63 × 10/54 × 10 = 630/540 - Subtract the two like fractions:
567/540 - 630/540 = 567 - 630/540 = -63/540 - After reducing the fraction, the answer is -7/60
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