Subtract 18/27 from 28/72, Solve 28/72

Subtract 18/27 from 28/72

28/72 - 18/27 is -5/18.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216

Next, find the equivalent fraction of both fractional numbers with denominator 216
For the 1st fraction, since 72 × 3 = 216,
28/72 = 28 × 3/72 × 3 = 84/216
Likewise, for the 2nd fraction, since 27 × 8 = 216,
18/27 = 18 × 8/27 × 8 = 144/216
Subtract the two like fractions:
84/216 - 144/216 = 84 - 144/216 = -60/216
After reducing the fraction, the answer is -5/18

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