Add 40/12 and 42/18, Solve 3 4/12 + 2 6/18 as a fraction

Add 40/12 and 42/18

1^st number: 3 4/12, 2^nd number: 2 6/18

40/12 + 42/18 is 17/3.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 12 × 3 = 36,
40/12 = 40 × 3/12 × 3 = 120/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
42/18 = 42 × 2/18 × 2 = 84/36
Add the two like fractions:
120/36 + 84/36 = 120 + 84/36 = 204/36
204/36 simplified gives 17/3
So, 40/12 + 42/18 = 17/3
In mixed form: 52/3

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