Subtract 15/63 from 7/20, Solve 7/20

Subtract 15/63 from 7/20

7/20 - 15/63 is 47/420.

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,
7/20 = 7 × 63/20 × 63 = 441/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
15/63 = 15 × 20/63 × 20 = 300/1260
Subtract the two like fractions:
441/1260 - 300/1260 = 441 - 300/1260 = 141/1260
After reducing the fraction, the answer is 47/420

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