Add 54/21 and 4/81, Solve 2 12/21 + 4/81 as a fraction

Add 54/21 and 4/81

1^st number: 2 12/21, 2^nd number: 4/81

54/21 + 4/81 is 1486/567.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567

Next, find the equivalent fraction of both fractional numbers with denominator 567
For the 1st fraction, since 21 × 27 = 567,
54/21 = 54 × 27/21 × 27 = 1458/567
Likewise, for the 2nd fraction, since 81 × 7 = 567,
4/81 = 4 × 7/81 × 7 = 28/567
Add the two like fractions:
1458/567 + 28/567 = 1458 + 28/567 = 1486/567
So, 54/21 + 4/81 = 1486/567
In mixed form: 2352/567

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