Add 8/9 and 81/90
8/9 + 81/90 is 161/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
8/9 = 8 × 10/9 × 10 = 80/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
81/90 = 81 × 1/90 × 1 = 81/90 - Add the two like fractions:
80/90 + 81/90 = 80 + 81/90 = 161/90 - So, 8/9 + 81/90 = 161/90
In mixed form: 171/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9+81/90 8/18+81/90 24/9+81/90 8/27+81/90 40/9+81/90 8/45+81/90 56/9+81/90 8/63+81/90