Add 28/12 and 42/54, Solve 2 4/12 + 42/54 as a fraction

Add 28/12 and 42/54

1^st number: 2 4/12, 2^nd number: 42/54

28/12 + 42/54 is 28/9.

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,
28/12 = 28 × 9/12 × 9 = 252/108
Likewise, for the 2nd fraction, since 54 × 2 = 108,
42/54 = 42 × 2/54 × 2 = 84/108
Add the two like fractions:
252/108 + 84/108 = 252 + 84/108 = 336/108
336/108 simplified gives 28/9
So, 28/12 + 42/54 = 28/9
In mixed form: 31/9

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