Subtract 15/81 from 90/7
1st number: 12 6/7, 2nd number: 15/81
90/7 - 15/81 is 2395/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
90/7 = 90 × 81/7 × 81 = 7290/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
15/81 = 15 × 7/81 × 7 = 105/567 - Subtract the two like fractions:
7290/567 - 105/567 = 7290 - 105/567 = 7185/567 - After reducing the fraction, the answer is 2395/189
- In mixed form: 12127/189
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