Add 54/21 and 54/84, Solve 2 12/21 + 54/84 as a fraction

Add 54/21 and 54/84

1^st number: 2 12/21, 2^nd number: 54/84

54/21 + 54/84 is 45/14.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 21 × 4 = 84,
54/21 = 54 × 4/21 × 4 = 216/84
Likewise, for the 2nd fraction, since 84 × 1 = 84,
54/84 = 54 × 1/84 × 1 = 54/84
Add the two like fractions:
216/84 + 54/84 = 216 + 54/84 = 270/84
270/84 simplified gives 45/14
So, 54/21 + 54/84 = 45/14
In mixed form: 33/14

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