Subtract 24/21 from 10/54, Solve 10/54

Subtract 24/21 from 10/54

1^st number: 10/54, 2^nd number: 1 3/21

10/54 - 24/21 is -181/189.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
10/54 = 10 × 7/54 × 7 = 70/378
Likewise, for the 2nd fraction, since 21 × 18 = 378,
24/21 = 24 × 18/21 × 18 = 432/378
Subtract the two like fractions:
70/378 - 432/378 = 70 - 432/378 = -362/378
After reducing the fraction, the answer is -181/189

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