Subtract 9/7 from 56/72, Solve 56/72

Subtract 9/7 from 56/72

1^st number: 56/72, 2^nd number: 1 2/7

56/72 - 9/7 is -32/63.

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,
56/72 = 56 × 7/72 × 7 = 392/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
9/7 = 9 × 72/7 × 72 = 648/504
Subtract the two like fractions:
392/504 - 648/504 = 392 - 648/504 = -256/504
After reducing the fraction, the answer is -32/63

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