Add 12/9 and 20/90
1st number: 1 3/9, 2nd number: 20/90
12/9 + 20/90 is 14/9.
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,
12/9 = 12 × 10/9 × 10 = 120/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Add the two like fractions:
120/90 + 20/90 = 120 + 20/90 = 140/90 - 140/90 simplified gives 14/9
- So, 12/9 + 20/90 = 14/9
In mixed form: 15/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+20/90 12/9+40/90 12/18+20/90 36/9+20/90 12/9+60/90 12/27+20/90 60/9+20/90 12/45+20/90 84/9+20/90 12/63+20/90