Subtract 7/63 from 42/18, Solve 2 6/18

Subtract 7/63 from 42/18

1^st number: 2 6/18, 2^nd number: 7/63

42/18 - 7/63 is 20/9.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
7/63 = 7 × 2/63 × 2 = 14/126
Subtract the two like fractions:
294/126 - 14/126 = 294 - 14/126 = 280/126
After reducing the fraction, the answer is 20/9
In mixed form: 22/9

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