Subtract 80/20 from 6/63, Solve 6/63

Subtract 80/20 from 6/63

1^st number: 6/63, 2^nd number: 4 0/20

6/63 - 80/20 is -82/21.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
6/63 = 6 × 20/63 × 20 = 120/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
80/20 = 80 × 63/20 × 63 = 5040/1260
Subtract the two like fractions:
120/1260 - 5040/1260 = 120 - 5040/1260 = -4920/1260
After reducing the fraction, the answer is -82/21

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