Subtract 9/10 from 72/63, Solve 1 9/63

Subtract 9/10 from 72/63

1^st number: 1 9/63, 2^nd number: 9/10

72/63 - 9/10 is 17/70.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
72/63 = 72 × 10/63 × 10 = 720/630
Likewise, for the 2nd fraction, since 10 × 63 = 630,
9/10 = 9 × 63/10 × 63 = 567/630
Subtract the two like fractions:
720/630 - 567/630 = 720 - 567/630 = 153/630
After reducing the fraction, the answer is 17/70

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