Add 15/6 and 21/40
1st number: 2 3/6, 2nd number: 21/40
15/6 + 21/40 is 121/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
15/6 = 15 × 20/6 × 20 = 300/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Add the two like fractions:
300/120 + 63/120 = 300 + 63/120 = 363/120 - 363/120 simplified gives 121/40
- So, 15/6 + 21/40 = 121/40
In mixed form: 31/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/6+21/40 15/6+42/40 15/12+21/40 15/6+21/80 45/6+21/40 15/6+63/40 15/18+21/40 75/6+21/40 15/30+21/40 15/42+21/40