Add 80/21 and 10/8, Solve 3 17/21 + 1 2/8 as a fraction

Add 80/21 and 10/8

1^st number: 3 17/21, 2^nd number: 1 2/8

80/21 + 10/8 is 425/84.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 21 × 8 = 168,
80/21 = 80 × 8/21 × 8 = 640/168
Likewise, for the 2nd fraction, since 8 × 21 = 168,
10/8 = 10 × 21/8 × 21 = 210/168
Add the two like fractions:
640/168 + 210/168 = 640 + 210/168 = 850/168
850/168 simplified gives 425/84
So, 80/21 + 10/8 = 425/84
In mixed form: 55/84

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