Add 18/6 and 81/12, Solve 3 0/6 + 6 9/12 as a fraction

Add 18/6 and 81/12

1^st number: 3 0/6, 2^nd number: 6 9/12

18/6 + 81/12 is 39/4.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 12 is 12

Next, find the equivalent fraction of both fractional numbers with denominator 12
For the 1st fraction, since 6 × 2 = 12,
18/6 = 18 × 2/6 × 2 = 36/12
Likewise, for the 2nd fraction, since 12 × 1 = 12,
81/12 = 81 × 1/12 × 1 = 81/12
Add the two like fractions:
36/12 + 81/12 = 36 + 81/12 = 117/12
117/12 simplified gives 39/4
So, 18/6 + 81/12 = 39/4
In mixed form: 93/4

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