Add 42/21 and 30/27, Solve 2 0/21 + 1 3/27 as a fraction

Add 42/21 and 30/27

1^st number: 2 0/21, 2^nd number: 1 3/27

42/21 + 30/27 is 28/9.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 21 × 9 = 189,
42/21 = 42 × 9/21 × 9 = 378/189
Likewise, for the 2nd fraction, since 27 × 7 = 189,
30/27 = 30 × 7/27 × 7 = 210/189
Add the two like fractions:
378/189 + 210/189 = 378 + 210/189 = 588/189
588/189 simplified gives 28/9
So, 42/21 + 30/27 = 28/9
In mixed form: 31/9

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