Subtract 15/20 from 4/63, Solve 4/63

Subtract 15/20 from 4/63

4/63 - 15/20 is -173/252.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
4/63 = 4 × 20/63 × 20 = 80/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
15/20 = 15 × 63/20 × 63 = 945/1260
Subtract the two like fractions:
80/1260 - 945/1260 = 80 - 945/1260 = -865/1260
After reducing the fraction, the answer is -173/252

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