Subtract 49/54 from 42/12, Solve 3 6/12

Subtract 49/54 from 42/12

1^st number: 3 6/12, 2^nd number: 49/54

42/12 - 49/54 is 70/27.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 54 is 108

Next, find the equivalent fraction of both fractional numbers with denominator 108
For the 1st fraction, since 12 × 9 = 108,
42/12 = 42 × 9/12 × 9 = 378/108
Likewise, for the 2nd fraction, since 54 × 2 = 108,
49/54 = 49 × 2/54 × 2 = 98/108
Subtract the two like fractions:
378/108 - 98/108 = 378 - 98/108 = 280/108
After reducing the fraction, the answer is 70/27
In mixed form: 216/27

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