Subtract 14/80 from 21/72, Solve 21/72

Subtract 14/80 from 21/72

21/72 - 14/80 is 7/60.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 72 × 10 = 720,
21/72 = 21 × 10/72 × 10 = 210/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
14/80 = 14 × 9/80 × 9 = 126/720
Subtract the two like fractions:
210/720 - 126/720 = 210 - 126/720 = 84/720
After reducing the fraction, the answer is 7/60

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