Subtract 63/45 from 15/12, Solve 1 3/12

Subtract 63/45 from 15/12

1^st number: 1 3/12, 2^nd number: 1 18/45

15/12 - 63/45 is -3/20.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 12 × 15 = 180,
15/12 = 15 × 15/12 × 15 = 225/180
Likewise, for the 2nd fraction, since 45 × 4 = 180,
63/45 = 63 × 4/45 × 4 = 252/180
Subtract the two like fractions:
225/180 - 252/180 = 225 - 252/180 = -27/180
After reducing the fraction, the answer is -3/20

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