Add 81/36 and 84/18, Solve 2 9/36 + 4 12/18 as a fraction

Add 81/36 and 84/18

1^st number: 2 9/36, 2^nd number: 4 12/18

81/36 + 84/18 is 83/12.

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

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 36 × 1 = 36,
81/36 = 81 × 1/36 × 1 = 81/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
84/18 = 84 × 2/18 × 2 = 168/36
Add the two like fractions:
81/36 + 168/36 = 81 + 168/36 = 249/36
249/36 simplified gives 83/12
So, 81/36 + 84/18 = 83/12
In mixed form: 611/12

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