Subtract 6/7 from 81/6, Solve 13 3/6

Subtract 6/7 from 81/6

1^st number: 13 3/6, 2^nd number: 6/7

81/6 - 6/7 is 177/14.

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,
81/6 = 81 × 7/6 × 7 = 567/42
Likewise, for the 2nd fraction, since 7 × 6 = 42,
6/7 = 6 × 6/7 × 6 = 36/42
Subtract the two like fractions:
567/42 - 36/42 = 567 - 36/42 = 531/42
After reducing the fraction, the answer is 177/14
In mixed form: 129/14

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