Add 98/10 and 80/21, Solve 9 8/10 + 3 17/21 as a fraction

Add 98/10 and 80/21

1^st number: 9 8/10, 2^nd number: 3 17/21

98/10 + 80/21 is 1429/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
98/10 = 98 × 21/10 × 21 = 2058/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210
Add the two like fractions:
2058/210 + 800/210 = 2058 + 800/210 = 2858/210
2858/210 simplified gives 1429/105
So, 98/10 + 80/21 = 1429/105
In mixed form: 1364/105

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