Subtract 80/27 from 42/12, Solve 3 6/12

Subtract 80/27 from 42/12

1^st number: 3 6/12, 2^nd number: 2 26/27

42/12 - 80/27 is 29/54.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 27 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 27 × 4 = 108,
80/27 = 80 × 4/27 × 4 = 320/108
Subtract the two like fractions:
378/108 - 320/108 = 378 - 320/108 = 58/108
After reducing the fraction, the answer is 29/54

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