Subtract 15/54 from 30/80, Solve 30/80

Subtract 15/54 from 30/80

30/80 - 15/54 is 7/72.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 54 is 2160

Next, find the equivalent fraction of both fractional numbers with denominator 2160
For the 1st fraction, since 80 × 27 = 2160,
30/80 = 30 × 27/80 × 27 = 810/2160
Likewise, for the 2nd fraction, since 54 × 40 = 2160,
15/54 = 15 × 40/54 × 40 = 600/2160
Subtract the two like fractions:
810/2160 - 600/2160 = 810 - 600/2160 = 210/2160
After reducing the fraction, the answer is 7/72

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