Subtract 63/16 from 12/18, Solve 12/18

Subtract 63/16 from 12/18

1^st number: 12/18, 2^nd number: 3 15/16

12/18 - 63/16 is -157/48.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 18 × 8 = 144,
12/18 = 12 × 8/18 × 8 = 96/144
Likewise, for the 2nd fraction, since 16 × 9 = 144,
63/16 = 63 × 9/16 × 9 = 567/144
Subtract the two like fractions:
96/144 - 567/144 = 96 - 567/144 = -471/144
After reducing the fraction, the answer is -157/48

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