Subtract 20/6 from 6/63, Solve 6/63

Subtract 20/6 from 6/63

1^st number: 6/63, 2^nd number: 3 2/6

6/63 - 20/6 is -68/21.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 6 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 63 × 2 = 126,
6/63 = 6 × 2/63 × 2 = 12/126
Likewise, for the 2nd fraction, since 6 × 21 = 126,
20/6 = 20 × 21/6 × 21 = 420/126
Subtract the two like fractions:
12/126 - 420/126 = 12 - 420/126 = -408/126
After reducing the fraction, the answer is -68/21

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