Subtract 81/54 from 7/20
1st number: 7/20, 2nd number: 1 27/54
7/20 - 81/54 is -23/20.
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,
7/20 = 7 × 27/20 × 27 = 189/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
81/54 = 81 × 10/54 × 10 = 810/540 - Subtract the two like fractions:
189/540 - 810/540 = 189 - 810/540 = -621/540 - After reducing the fraction, the answer is -23/20
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