Add 21/9 and 75/70, Solve 2 3/9 + 1 5/70 as a fraction

Add 21/9 and 75/70

1^st number: 2 3/9, 2^nd number: 1 5/70

21/9 + 75/70 is 143/42.

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,
75/70 = 75 × 9/70 × 9 = 675/630
Add the two like fractions:
1470/630 + 675/630 = 1470 + 675/630 = 2145/630
2145/630 simplified gives 143/42
So, 21/9 + 75/70 = 143/42
In mixed form: 317/42

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