Add 21/9 and 20/70, Solve 2 3/9 + 20/70 as a fraction

Add 21/9 and 20/70

1^st number: 2 3/9, 2^nd number: 20/70

21/9 + 20/70 is 55/21.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 9 × 70 = 630,
21/9 = 21 × 70/9 × 70 = 1470/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630
Add the two like fractions:
1470/630 + 180/630 = 1470 + 180/630 = 1650/630
1650/630 simplified gives 55/21
So, 21/9 + 20/70 = 55/21
In mixed form: 213/21

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