Subtract 10/20 from 42/63, Solve 42/63

Subtract 10/20 from 42/63

42/63 - 10/20 is 1/6.

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,
42/63 = 42 × 20/63 × 20 = 840/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
10/20 = 10 × 63/20 × 63 = 630/1260
Subtract the two like fractions:
840/1260 - 630/1260 = 840 - 630/1260 = 210/1260
After reducing the fraction, the answer is 1/6

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