Add 21/81 and 27/12, Solve 21/81 + 2 3/12 as a fraction

Add 21/81 and 27/12

1^st number: 21/81, 2^nd number: 2 3/12

21/81 + 27/12 is 271/108.

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324

Next, find the equivalent fraction of both fractional numbers with denominator 324
For the 1st fraction, since 81 × 4 = 324,
21/81 = 21 × 4/81 × 4 = 84/324
Likewise, for the 2nd fraction, since 12 × 27 = 324,
27/12 = 27 × 27/12 × 27 = 729/324
Add the two like fractions:
84/324 + 729/324 = 84 + 729/324 = 813/324
813/324 simplified gives 271/108
So, 21/81 + 27/12 = 271/108
In mixed form: 255/108

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