Subtract 24/27 from 81/60, Solve 1 21/60

Subtract 24/27 from 81/60

1^st number: 1 21/60, 2^nd number: 24/27

81/60 - 24/27 is 83/180.

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,
81/60 = 81 × 9/60 × 9 = 729/540
Likewise, for the 2nd fraction, since 27 × 20 = 540,
24/27 = 24 × 20/27 × 20 = 480/540
Subtract the two like fractions:
729/540 - 480/540 = 729 - 480/540 = 249/540
After reducing the fraction, the answer is 83/180

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