Subtract 60/54 from 5/21, Solve 5/21

Subtract 60/54 from 5/21

1^st number: 5/21, 2^nd number: 1 6/54

5/21 - 60/54 is -55/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 21 × 18 = 378,
5/21 = 5 × 18/21 × 18 = 90/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
60/54 = 60 × 7/54 × 7 = 420/378
Subtract the two like fractions:
90/378 - 420/378 = 90 - 420/378 = -330/378
After reducing the fraction, the answer is -55/63

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