Add 3/20 and 9/40
3/20 + 9/40 is 3/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
3/20 = 3 × 2/20 × 2 = 6/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Add the two like fractions:
6/40 + 9/40 = 6 + 9/40 = 15/40 - 15/40 simplified gives 3/8
- So, 3/20 + 9/40 = 3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+9/40 3/20+18/40 3/40+9/40 3/20+9/80 9/20+9/40 3/20+27/40 3/60+9/40 15/20+9/40 3/20+45/40 21/20+9/40 3/20+63/40