Subtract 10/63 from 4/20, Solve 4/20

Subtract 10/63 from 4/20

4/20 - 10/63 is 13/315.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 20 × 63 = 1260,
4/20 = 4 × 63/20 × 63 = 252/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
10/63 = 10 × 20/63 × 20 = 200/1260
Subtract the two like fractions:
252/1260 - 200/1260 = 252 - 200/1260 = 52/1260
After reducing the fraction, the answer is 13/315

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