Subtract 63/21 from 9/36, Solve 9/36

Subtract 63/21 from 9/36

1^st number: 9/36, 2^nd number: 3 0/21

9/36 - 63/21 is -11/4.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
9/36 = 9 × 7/36 × 7 = 63/252
Likewise, for the 2nd fraction, since 21 × 12 = 252,
63/21 = 63 × 12/21 × 12 = 756/252
Subtract the two like fractions:
63/252 - 756/252 = 63 - 756/252 = -693/252
After reducing the fraction, the answer is -11/4

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