Add 10/15 and 9/20
10/15 + 9/20 is 67/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
10/15 = 10 × 4/15 × 4 = 40/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Add the two like fractions:
40/60 + 27/60 = 40 + 27/60 = 67/60 - So, 10/15 + 9/20 = 67/60
In mixed form: 17/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+9/20 10/15+18/20 10/30+9/20 10/15+9/40 30/15+9/20 10/15+27/20 10/45+9/20 10/15+9/60 50/15+9/20 10/15+45/20 10/75+9/20 70/15+9/20 10/15+63/20