Subtract 1/81 from 90/42
1st number: 2 6/42, 2nd number: 1/81
90/42 - 1/81 is 1208/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
90/42 = 90 × 27/42 × 27 = 2430/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
1/81 = 1 × 14/81 × 14 = 14/1134 - Subtract the two like fractions:
2430/1134 - 14/1134 = 2430 - 14/1134 = 2416/1134 - After reducing the fraction, the answer is 1208/567
- In mixed form: 274/567
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