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

Subtract 3/63 from 12/15

12/15 - 3/63 is 79/105.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 15 × 21 = 315,
12/15 = 12 × 21/15 × 21 = 252/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
3/63 = 3 × 5/63 × 5 = 15/315
Subtract the two like fractions:
252/315 - 15/315 = 252 - 15/315 = 237/315
After reducing the fraction, the answer is 79/105

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