Subtract 9/7 from 8/72, Solve 8/72

Subtract 9/7 from 8/72

1^st number: 8/72, 2^nd number: 1 2/7

8/72 - 9/7 is -74/63.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
8/72 = 8 × 7/72 × 7 = 56/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
9/7 = 9 × 72/7 × 72 = 648/504
Subtract the two like fractions:
56/504 - 648/504 = 56 - 648/504 = -592/504
After reducing the fraction, the answer is -74/63

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