Subtract 9/63 from 42/10, Solve 4 2/10

Subtract 9/63 from 42/10

1^st number: 4 2/10, 2^nd number: 9/63

42/10 - 9/63 is 142/35.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 10 × 63 = 630,
42/10 = 42 × 63/10 × 63 = 2646/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
9/63 = 9 × 10/63 × 10 = 90/630
Subtract the two like fractions:
2646/630 - 90/630 = 2646 - 90/630 = 2556/630
After reducing the fraction, the answer is 142/35
In mixed form: 42/35

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