Add 21/9 and 15/70, Solve 2 3/9 + 15/70 as a fraction

Add 21/9 and 15/70

1^st number: 2 3/9, 2^nd number: 15/70

21/9 + 15/70 is 107/42.

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,
15/70 = 15 × 9/70 × 9 = 135/630
Add the two like fractions:
1470/630 + 135/630 = 1470 + 135/630 = 1605/630
1605/630 simplified gives 107/42
So, 21/9 + 15/70 = 107/42
In mixed form: 223/42

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