Subtract 7/36 from 21/7, Solve 3 0/7

Subtract 7/36 from 21/7

1^st number: 3 0/7, 2^nd number: 7/36

21/7 - 7/36 is 101/36.

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,
21/7 = 21 × 36/7 × 36 = 756/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
7/36 = 7 × 7/36 × 7 = 49/252
Subtract the two like fractions:
756/252 - 49/252 = 756 - 49/252 = 707/252
After reducing the fraction, the answer is 101/36
In mixed form: 229/36

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