Add 84/42 and 98/80, Solve 2 0/42 + 1 18/80 as a fraction

Add 84/42 and 98/80

1^st number: 2 0/42, 2^nd number: 1 18/80

84/42 + 98/80 is 129/40.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 42 × 40 = 1680,
84/42 = 84 × 40/42 × 40 = 3360/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
98/80 = 98 × 21/80 × 21 = 2058/1680
Add the two like fractions:
3360/1680 + 2058/1680 = 3360 + 2058/1680 = 5418/1680
5418/1680 simplified gives 129/40
So, 84/42 + 98/80 = 129/40
In mixed form: 39/40

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