Subtract 16/63 from 4/42, Solve 4/42

Subtract 16/63 from 4/42

4/42 - 16/63 is -10/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
4/42 = 4 × 3/42 × 3 = 12/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
16/63 = 16 × 2/63 × 2 = 32/126
Subtract the two like fractions:
12/126 - 32/126 = 12 - 32/126 = -20/126
After reducing the fraction, the answer is -10/63

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