Add 12/90 and 15/9
1st number: 12/90, 2nd number: 1 6/9
12/90 + 15/9 is 9/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
15/9 = 15 × 10/9 × 10 = 150/90 - Add the two like fractions:
12/90 + 150/90 = 12 + 150/90 = 162/90 - 162/90 simplified gives 9/5
- So, 12/90 + 15/9 = 9/5
In mixed form: 14/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+15/9 12/90+30/9 12/90+15/18 36/90+15/9 12/90+45/9 12/90+15/27 60/90+15/9 12/90+75/9 12/90+15/45 84/90+15/9 12/90+15/63