Subtract 81/7 from 21/6
1st number: 3 3/6, 2nd number: 11 4/7
21/6 - 81/7 is -113/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
81/7 = 81 × 6/7 × 6 = 486/42 - Subtract the two like fractions:
147/42 - 486/42 = 147 - 486/42 = -339/42 - After reducing the fraction, the answer is -113/14
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