Subtract 42/63 from 20/14, Solve 1 6/14

Subtract 42/63 from 20/14

1^st number: 1 6/14, 2^nd number: 42/63

20/14 - 42/63 is 16/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
20/14 = 20 × 9/14 × 9 = 180/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
42/63 = 42 × 2/63 × 2 = 84/126
Subtract the two like fractions:
180/126 - 84/126 = 180 - 84/126 = 96/126
After reducing the fraction, the answer is 16/21

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