Subtract 42/63 from 4/15, Solve 4/15

Subtract 42/63 from 4/15

4/15 - 42/63 is -2/5.

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,
4/15 = 4 × 21/15 × 21 = 84/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
42/63 = 42 × 5/63 × 5 = 210/315
Subtract the two like fractions:
84/315 - 210/315 = 84 - 210/315 = -126/315
After reducing the fraction, the answer is -2/5

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