Subtract 20/54 from 60/21, Solve 2 18/21

Subtract 20/54 from 60/21

1^st number: 2 18/21, 2^nd number: 20/54

60/21 - 20/54 is 470/189.

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,
60/21 = 60 × 18/21 × 18 = 1080/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
20/54 = 20 × 7/54 × 7 = 140/378
Subtract the two like fractions:
1080/378 - 140/378 = 1080 - 140/378 = 940/378
After reducing the fraction, the answer is 470/189
In mixed form: 292/189

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