Subtract 72/27 from 45/60, Solve 45/60

Subtract 72/27 from 45/60

1^st number: 45/60, 2^nd number: 2 18/27

45/60 - 72/27 is -23/12.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 27 is 540

Next, find the equivalent fraction of both fractional numbers with denominator 540
For the 1st fraction, since 60 × 9 = 540,
45/60 = 45 × 9/60 × 9 = 405/540
Likewise, for the 2nd fraction, since 27 × 20 = 540,
72/27 = 72 × 20/27 × 20 = 1440/540
Subtract the two like fractions:
405/540 - 1440/540 = 405 - 1440/540 = -1035/540
After reducing the fraction, the answer is -23/12

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