Subtract 3/63 from 42/30, Solve 1 12/30

Subtract 3/63 from 42/30

1^st number: 1 12/30, 2^nd number: 3/63

42/30 - 3/63 is 142/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 30 × 21 = 630,
42/30 = 42 × 21/30 × 21 = 882/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
3/63 = 3 × 10/63 × 10 = 30/630
Subtract the two like fractions:
882/630 - 30/630 = 882 - 30/630 = 852/630
After reducing the fraction, the answer is 142/105
In mixed form: 137/105

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