Subtract 42/30 from 4/63, Solve 4/63

Subtract 42/30 from 4/63

1^st number: 4/63, 2^nd number: 1 12/30

4/63 - 42/30 is -421/315.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
4/63 = 4 × 10/63 × 10 = 40/630
Likewise, for the 2nd fraction, since 30 × 21 = 630,
42/30 = 42 × 21/30 × 21 = 882/630
Subtract the two like fractions:
40/630 - 882/630 = 40 - 882/630 = -842/630
After reducing the fraction, the answer is -421/315

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