Add 15/40 and 9/20
15/40 + 9/20 is 33/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
9/20 = 9 × 2/20 × 2 = 18/40 - Add the two like fractions:
15/40 + 18/40 = 15 + 18/40 = 33/40 - So, 15/40 + 9/20 = 33/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+9/20 15/40+18/20 15/80+9/20 15/40+9/40 45/40+9/20 15/40+27/20 15/40+9/60 75/40+9/20 15/40+45/20 15/40+63/20