Subtract 45/15 from 27/72, Solve 27/72

Subtract 45/15 from 27/72

1^st number: 27/72, 2^nd number: 3 0/15

27/72 - 45/15 is -21/8.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 15 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 72 × 5 = 360,
27/72 = 27 × 5/72 × 5 = 135/360
Likewise, for the 2nd fraction, since 15 × 24 = 360,
45/15 = 45 × 24/15 × 24 = 1080/360
Subtract the two like fractions:
135/360 - 1080/360 = 135 - 1080/360 = -945/360
After reducing the fraction, the answer is -21/8

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