Add 54/21 and 27/36, Solve 2 12/21 + 27/36 as a fraction

Add 54/21 and 27/36

1^st number: 2 12/21, 2^nd number: 27/36

54/21 + 27/36 is 93/28.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 21 × 12 = 252,
54/21 = 54 × 12/21 × 12 = 648/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
27/36 = 27 × 7/36 × 7 = 189/252
Add the two like fractions:
648/252 + 189/252 = 648 + 189/252 = 837/252
837/252 simplified gives 93/28
So, 54/21 + 27/36 = 93/28
In mixed form: 39/28

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