Subtract 5/7 from 75/81
75/81 - 5/7 is 40/189.
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,
75/81 = 75 × 7/81 × 7 = 525/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
5/7 = 5 × 81/7 × 81 = 405/567 - Subtract the two like fractions:
525/567 - 405/567 = 525 - 405/567 = 120/567 - After reducing the fraction, the answer is 40/189
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