Add 2/5 and 15/40
2/5 + 15/40 is 31/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
2/5 = 2 × 8/5 × 8 = 16/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Add the two like fractions:
16/40 + 15/40 = 16 + 15/40 = 31/40 - So, 2/5 + 15/40 = 31/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5+15/40 2/5+30/40 2/10+15/40 2/5+15/80 6/5+15/40 2/5+45/40 2/15+15/40 10/5+15/40 2/5+75/40 2/25+15/40 14/5+15/40 2/35+15/40