Add 12/15 and 9/10
12/15 + 9/10 is 17/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
12/15 = 12 × 2/15 × 2 = 24/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
9/10 = 9 × 3/10 × 3 = 27/30 - Add the two like fractions:
24/30 + 27/30 = 24 + 27/30 = 51/30 - 51/30 simplified gives 17/10
- So, 12/15 + 9/10 = 17/10
In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+9/10 12/15+18/10 12/30+9/10 12/15+9/20 36/15+9/10 12/15+27/10 12/45+9/10 12/15+9/30 60/15+9/10 12/15+45/10 12/75+9/10 12/15+9/50 84/15+9/10 12/15+63/10 12/15+9/70