Subtract 7/63 from 42/2, Solve 21 0/2

Subtract 7/63 from 42/2

1^st number: 21 0/2, 2^nd number: 7/63

42/2 - 7/63 is 188/9.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 2 × 63 = 126,
42/2 = 42 × 63/2 × 63 = 2646/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
7/63 = 7 × 2/63 × 2 = 14/126
Subtract the two like fractions:
2646/126 - 14/126 = 2646 - 14/126 = 2632/126
After reducing the fraction, the answer is 188/9
In mixed form: 208/9

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