Add 12/18 and 35/21, Solve 12/18 + 1 14/21 as a fraction

Add 12/18 and 35/21

1^st number: 12/18, 2^nd number: 1 14/21

12/18 + 35/21 is 7/3.

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,
35/21 = 35 × 6/21 × 6 = 210/126
Add the two like fractions:
84/126 + 210/126 = 84 + 210/126 = 294/126
294/126 simplified gives 7/3
So, 12/18 + 35/21 = 7/3
In mixed form: 21/3

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