Subtract 90/42 from 4/63, Solve 4/63

Subtract 90/42 from 4/63

1^st number: 4/63, 2^nd number: 2 6/42

4/63 - 90/42 is -131/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 63 × 2 = 126,
4/63 = 4 × 2/63 × 2 = 8/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
90/42 = 90 × 3/42 × 3 = 270/126
Subtract the two like fractions:
8/126 - 270/126 = 8 - 270/126 = -262/126
After reducing the fraction, the answer is -131/63

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