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

Subtract 72/63 from 9/10

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

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

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

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

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