Subtract 12/20 from 72/63, Solve 1 9/63

Subtract 12/20 from 72/63

1^st number: 1 9/63, 2^nd number: 12/20

72/63 - 12/20 is 19/35.

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,
72/63 = 72 × 20/63 × 20 = 1440/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
12/20 = 12 × 63/20 × 63 = 756/1260
Subtract the two like fractions:
1440/1260 - 756/1260 = 1440 - 756/1260 = 684/1260
After reducing the fraction, the answer is 19/35

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