Add 30/9 and 80/42, Solve 3 3/9 + 1 38/42 as a fraction

Add 30/9 and 80/42

1^st number: 3 3/9, 2^nd number: 1 38/42

30/9 + 80/42 is 110/21.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 9 × 14 = 126,
30/9 = 30 × 14/9 × 14 = 420/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126
Add the two like fractions:
420/126 + 240/126 = 420 + 240/126 = 660/126
660/126 simplified gives 110/21
So, 30/9 + 80/42 = 110/21
In mixed form: 55/21

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