Add 10/20 and 9/15
10/20 + 9/15 is 11/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
10/20 = 10 × 3/20 × 3 = 30/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
9/15 = 9 × 4/15 × 4 = 36/60 - Add the two like fractions:
30/60 + 36/60 = 30 + 36/60 = 66/60 - 66/60 simplified gives 11/10
- So, 10/20 + 9/15 = 11/10
In mixed form: 11/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+18/15 10/40+9/15 10/20+9/30 30/20+9/15 10/20+27/15 10/60+9/15 10/20+9/45 50/20+9/15 10/20+45/15 10/20+9/75 70/20+9/15 10/20+63/15