Subtract 30/14 from 21/63, Solve 21/63

Subtract 30/14 from 21/63

1^st number: 21/63, 2^nd number: 2 2/14

21/63 - 30/14 is -38/21.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 63 × 2 = 126,
21/63 = 21 × 2/63 × 2 = 42/126
Likewise, for the 2nd fraction, since 14 × 9 = 126,
30/14 = 30 × 9/14 × 9 = 270/126
Subtract the two like fractions:
42/126 - 270/126 = 42 - 270/126 = -228/126
After reducing the fraction, the answer is -38/21

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