Add 20/9 and 90/12
1st number: 2 2/9, 2nd number: 7 6/12
20/9 + 90/12 is 175/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
20/9 = 20 × 4/9 × 4 = 80/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
90/12 = 90 × 3/12 × 3 = 270/36 - Add the two like fractions:
80/36 + 270/36 = 80 + 270/36 = 350/36 - 350/36 simplified gives 175/18
- So, 20/9 + 90/12 = 175/18
In mixed form: 913/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9+90/12 20/18+90/12 20/9+90/24 60/9+90/12 20/27+90/12 20/9+90/36 20/45+90/12 20/9+90/60 20/63+90/12 20/9+90/84