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

Add 9/12 and 81/18

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

9/12 + 81/18 is 21/4.

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,
9/12 = 9 × 3/12 × 3 = 27/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
81/18 = 81 × 2/18 × 2 = 162/36
Add the two like fractions:
27/36 + 162/36 = 27 + 162/36 = 189/36
189/36 simplified gives 21/4
So, 9/12 + 81/18 = 21/4
In mixed form: 51/4

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