Subtract 18/14 from 72/80, Solve 72/80

Subtract 18/14 from 72/80

1^st number: 72/80, 2^nd number: 1 4/14

72/80 - 18/14 is -27/70.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 14 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560
Likewise, for the 2nd fraction, since 14 × 40 = 560,
18/14 = 18 × 40/14 × 40 = 720/560
Subtract the two like fractions:
504/560 - 720/560 = 504 - 720/560 = -216/560
After reducing the fraction, the answer is -27/70

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