Subtract 27/16 from 18/72, Solve 18/72

Subtract 27/16 from 18/72

1^st number: 18/72, 2^nd number: 1 11/16

18/72 - 27/16 is -23/16.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 16 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 72 × 2 = 144,
18/72 = 18 × 2/72 × 2 = 36/144
Likewise, for the 2nd fraction, since 16 × 9 = 144,
27/16 = 27 × 9/16 × 9 = 243/144
Subtract the two like fractions:
36/144 - 243/144 = 36 - 243/144 = -207/144
After reducing the fraction, the answer is -23/16

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