Add 21/6 and 70/12, Solve 3 3/6 + 5 10/12 as a fraction

Add 21/6 and 70/12

1^st number: 3 3/6, 2^nd number: 5 10/12

21/6 + 70/12 is 28/3.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 12 is 12

Next, find the equivalent fraction of both fractional numbers with denominator 12
For the 1st fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12
Likewise, for the 2nd fraction, since 12 × 1 = 12,
70/12 = 70 × 1/12 × 1 = 70/12
Add the two like fractions:
42/12 + 70/12 = 42 + 70/12 = 112/12
112/12 simplified gives 28/3
So, 21/6 + 70/12 = 28/3
In mixed form: 91/3

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