Subtract 15/40 from 81/7
1st number: 11 4/7, 2nd number: 15/40
81/7 - 15/40 is 627/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
81/7 = 81 × 40/7 × 40 = 3240/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Subtract the two like fractions:
3240/280 - 105/280 = 3240 - 105/280 = 3135/280 - After reducing the fraction, the answer is 627/56
- In mixed form: 1111/56
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