Add 80/35 and 70/42, Solve 2 10/35 + 1 28/42 as a fraction

Add 80/35 and 70/42

1^st number: 2 10/35, 2^nd number: 1 28/42

80/35 + 70/42 is 83/21.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 35 × 6 = 210,
80/35 = 80 × 6/35 × 6 = 480/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
70/42 = 70 × 5/42 × 5 = 350/210
Add the two like fractions:
480/210 + 350/210 = 480 + 350/210 = 830/210
830/210 simplified gives 83/21
So, 80/35 + 70/42 = 83/21
In mixed form: 320/21

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