Add 30/40 and 9/20
30/40 + 9/20 is 6/5.
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,
30/40 = 30 × 1/40 × 1 = 30/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
9/20 = 9 × 2/20 × 2 = 18/40 - Add the two like fractions:
30/40 + 18/40 = 30 + 18/40 = 48/40 - 48/40 simplified gives 6/5
- So, 30/40 + 9/20 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+9/20 30/40+18/20 30/80+9/20 30/40+9/40 90/40+9/20 30/40+27/20 30/40+9/60 30/40+45/20 30/40+63/20