Subtract 21/36 from 80/7, Solve 11 3/7

Subtract 21/36 from 80/7

1^st number: 11 3/7, 2^nd number: 21/36

80/7 - 21/36 is 911/84.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 7 × 36 = 252,
80/7 = 80 × 36/7 × 36 = 2880/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252
Subtract the two like fractions:
2880/252 - 147/252 = 2880 - 147/252 = 2733/252
After reducing the fraction, the answer is 911/84
In mixed form: 1071/84

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