Add 7/15 and 9/20
7/15 + 9/20 is 11/12.
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,
7/15 = 7 × 4/15 × 4 = 28/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Add the two like fractions:
28/60 + 27/60 = 28 + 27/60 = 55/60 - 55/60 simplified gives 11/12
- So, 7/15 + 9/20 = 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15+9/20 7/15+18/20 7/30+9/20 7/15+9/40 21/15+9/20 7/15+27/20 7/45+9/20 7/15+9/60 35/15+9/20 7/15+45/20 7/75+9/20 49/15+9/20 7/15+63/20