Subtract 80/7 from 60/72, Solve 60/72

Subtract 80/7 from 60/72

1^st number: 60/72, 2^nd number: 11 3/7

60/72 - 80/7 is -445/42.

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,
60/72 = 60 × 7/72 × 7 = 420/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
80/7 = 80 × 72/7 × 72 = 5760/504
Subtract the two like fractions:
420/504 - 5760/504 = 420 - 5760/504 = -5340/504
After reducing the fraction, the answer is -445/42

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