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

Add 3/70 and 21/9

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

3/70 + 21/9 is 499/210.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
3/70 = 3 × 9/70 × 9 = 27/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
21/9 = 21 × 70/9 × 70 = 1470/630
Add the two like fractions:
27/630 + 1470/630 = 27 + 1470/630 = 1497/630
1497/630 simplified gives 499/210
So, 3/70 + 21/9 = 499/210
In mixed form: 279/210

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad