Subtract 21/7 from 10/36, Solve 10/36

Subtract 21/7 from 10/36

1^st number: 10/36, 2^nd number: 3 0/7

10/36 - 21/7 is -49/18.

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

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
10/36 = 10 × 7/36 × 7 = 70/252
Likewise, for the 2nd fraction, since 7 × 36 = 252,
21/7 = 21 × 36/7 × 36 = 756/252
Subtract the two like fractions:
70/252 - 756/252 = 70 - 756/252 = -686/252
After reducing the fraction, the answer is -49/18

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