Add 81/70 and 2/9, Solve 1 11/70 + 2/9 as a fraction

Add 81/70 and 2/9

1^st number: 1 11/70, 2^nd number: 2/9

81/70 + 2/9 is 869/630.

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,
81/70 = 81 × 9/70 × 9 = 729/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
2/9 = 2 × 70/9 × 70 = 140/630
Add the two like fractions:
729/630 + 140/630 = 729 + 140/630 = 869/630
So, 81/70 + 2/9 = 869/630
In mixed form: 1239/630

MathStep (Works offline)

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