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

Add 80/21 and 2/10

1^st number: 3 17/21, 2^nd number: 2/10

80/21 + 2/10 is 421/105.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
2/10 = 2 × 21/10 × 21 = 42/210
Add the two like fractions:
800/210 + 42/210 = 800 + 42/210 = 842/210
842/210 simplified gives 421/105
So, 80/21 + 2/10 = 421/105
In mixed form: 41/105

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