Subtract 54/7 from 40/81
1st number: 40/81, 2nd number: 7 5/7
40/81 - 54/7 is -4094/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
40/81 = 40 × 7/81 × 7 = 280/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
54/7 = 54 × 81/7 × 81 = 4374/567 - Subtract the two like fractions:
280/567 - 4374/567 = 280 - 4374/567 = -4094/567
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