Subtract 54/28 from 42/12, Solve 3 6/12

Subtract 54/28 from 42/12

1^st number: 3 6/12, 2^nd number: 1 26/28

42/12 - 54/28 is 11/7.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84
Likewise, for the 2nd fraction, since 28 × 3 = 84,
54/28 = 54 × 3/28 × 3 = 162/84
Subtract the two like fractions:
294/84 - 162/84 = 294 - 162/84 = 132/84
After reducing the fraction, the answer is 11/7
In mixed form: 14/7

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