Subtract 1/72 from 28/80, Solve 28/80

Subtract 1/72 from 28/80

28/80 - 1/72 is 121/360.

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

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
28/80 = 28 × 9/80 × 9 = 252/720
Likewise, for the 2nd fraction, since 72 × 10 = 720,
1/72 = 1 × 10/72 × 10 = 10/720
Subtract the two like fractions:
252/720 - 10/720 = 252 - 10/720 = 242/720
After reducing the fraction, the answer is 121/360

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