Add 12/18 and 42/21, Solve 12/18 + 2 0/21 as a fraction

Add 12/18 and 42/21

1^st number: 12/18, 2^nd number: 2 0/21

12/18 + 42/21 is 8/3.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
42/21 = 42 × 6/21 × 6 = 252/126
Add the two like fractions:
84/126 + 252/126 = 84 + 252/126 = 336/126
336/126 simplified gives 8/3
So, 12/18 + 42/21 = 8/3
In mixed form: 22/3

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