Add 20/12 and 28/8, Solve 1 8/12 + 3 4/8 as a fraction

Add 20/12 and 28/8

1^st number: 1 8/12, 2^nd number: 3 4/8

20/12 + 28/8 is 31/6.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24

Next, find the equivalent fraction of both fractional numbers with denominator 24
For the 1st fraction, since 12 × 2 = 24,
20/12 = 20 × 2/12 × 2 = 40/24
Likewise, for the 2nd fraction, since 8 × 3 = 24,
28/8 = 28 × 3/8 × 3 = 84/24
Add the two like fractions:
40/24 + 84/24 = 40 + 84/24 = 124/24
124/24 simplified gives 31/6
So, 20/12 + 28/8 = 31/6
In mixed form: 51/6

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