Subtract 63/7 from 8/20, Solve 8/20

Subtract 63/7 from 8/20

1^st number: 8/20, 2^nd number: 9 0/7

8/20 - 63/7 is -43/5.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 20 × 7 = 140,
8/20 = 8 × 7/20 × 7 = 56/140
Likewise, for the 2nd fraction, since 7 × 20 = 140,
63/7 = 63 × 20/7 × 20 = 1260/140
Subtract the two like fractions:
56/140 - 1260/140 = 56 - 1260/140 = -1204/140
After reducing the fraction, the answer is -43/5

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