Subtract 40/20 from 81/7
1st number: 11 4/7, 2nd number: 2 0/20
81/7 - 40/20 is 67/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
81/7 = 81 × 20/7 × 20 = 1620/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
40/20 = 40 × 7/20 × 7 = 280/140 - Subtract the two like fractions:
1620/140 - 280/140 = 1620 - 280/140 = 1340/140 - After reducing the fraction, the answer is 67/7
- In mixed form: 94/7
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