Add 10/9 and 90/80
1st number: 1 1/9, 2nd number: 1 10/80
10/9 + 90/80 is 161/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
10/9 = 10 × 80/9 × 80 = 800/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720 - Add the two like fractions:
800/720 + 810/720 = 800 + 810/720 = 1610/720 - 1610/720 simplified gives 161/72
- So, 10/9 + 90/80 = 161/72
In mixed form: 217/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/9+90/80 10/18+90/80 30/9+90/80 10/27+90/80 50/9+90/80 10/45+90/80 70/9+90/80 10/63+90/80