Add 8/9 and 81/70, Solve 8/9 + 1 11/70 as a fraction

Add 8/9 and 81/70

1^st number: 8/9, 2^nd number: 1 11/70

8/9 + 81/70 is 1289/630.

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,
8/9 = 8 × 70/9 × 70 = 560/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
81/70 = 81 × 9/70 × 9 = 729/630
Add the two like fractions:
560/630 + 729/630 = 560 + 729/630 = 1289/630
So, 8/9 + 81/70 = 1289/630
In mixed form: 229/630

MathStep (Works offline)

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