Subtract 72/54 from 18/15, Solve 1 3/15

Subtract 72/54 from 18/15

1^st number: 1 3/15, 2^nd number: 1 18/54

18/15 - 72/54 is -2/15.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 15 × 18 = 270,
18/15 = 18 × 18/15 × 18 = 324/270
Likewise, for the 2nd fraction, since 54 × 5 = 270,
72/54 = 72 × 5/54 × 5 = 360/270
Subtract the two like fractions:
324/270 - 360/270 = 324 - 360/270 = -36/270
After reducing the fraction, the answer is -2/15

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