Add 9/40 and 30/80
9/40 + 30/80 is 3/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
9/40 = 9 × 2/40 × 2 = 18/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80 - Add the two like fractions:
18/80 + 30/80 = 18 + 30/80 = 48/80 - 48/80 simplified gives 3/5
- So, 9/40 + 30/80 = 3/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+30/80 9/40+60/80 9/80+30/80 27/40+30/80 9/40+90/80 45/40+30/80 63/40+30/80