Subtract 4/20 from 40/63, Solve 40/63

Subtract 4/20 from 40/63

40/63 - 4/20 is 137/315.

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,
40/63 = 40 × 20/63 × 20 = 800/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
4/20 = 4 × 63/20 × 63 = 252/1260
Subtract the two like fractions:
800/1260 - 252/1260 = 800 - 252/1260 = 548/1260
After reducing the fraction, the answer is 137/315

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