Add 80/70 and 98/21, Solve 1 10/70 + 4 14/21 as a fraction

Add 80/70 and 98/21

1^st number: 1 10/70, 2^nd number: 4 14/21

80/70 + 98/21 is 122/21.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 70 × 3 = 210,
80/70 = 80 × 3/70 × 3 = 240/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
98/21 = 98 × 10/21 × 10 = 980/210
Add the two like fractions:
240/210 + 980/210 = 240 + 980/210 = 1220/210
1220/210 simplified gives 122/21
So, 80/70 + 98/21 = 122/21
In mixed form: 517/21

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