Subtract 63/36 from 21/48, Solve 21/48

Subtract 63/36 from 21/48

1^st number: 21/48, 2^nd number: 1 27/36

21/48 - 63/36 is -21/16.

Find the least common denominator or LCM of the two denominators:
LCM of 48 and 36 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 48 × 3 = 144,
21/48 = 21 × 3/48 × 3 = 63/144
Likewise, for the 2nd fraction, since 36 × 4 = 144,
63/36 = 63 × 4/36 × 4 = 252/144
Subtract the two like fractions:
63/144 - 252/144 = 63 - 252/144 = -189/144
After reducing the fraction, the answer is -21/16

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