Add 30/12 and 30/21, Solve 2 6/12 + 1 9/21 as a fraction

Add 30/12 and 30/21

1^st number: 2 6/12, 2^nd number: 1 9/21

30/12 + 30/21 is 55/14.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
30/12 = 30 × 7/12 × 7 = 210/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84
Add the two like fractions:
210/84 + 120/84 = 210 + 120/84 = 330/84
330/84 simplified gives 55/14
So, 30/12 + 30/21 = 55/14
In mixed form: 313/14

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