Subtract 63/7 from 27/72, Solve 27/72

Subtract 63/7 from 27/72

1^st number: 27/72, 2^nd number: 9 0/7

27/72 - 63/7 is -69/8.

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,
27/72 = 27 × 7/72 × 7 = 189/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
63/7 = 63 × 72/7 × 72 = 4536/504
Subtract the two like fractions:
189/504 - 4536/504 = 189 - 4536/504 = -4347/504
After reducing the fraction, the answer is -69/8

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