Add 21/6 and 20/5
1st number: 3 3/6, 2nd number: 4 0/5
21/6 + 20/5 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 5 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
21/6 = 21 × 5/6 × 5 = 105/30 - Likewise, for the 2nd fraction, since 5 × 6 = 30,
20/5 = 20 × 6/5 × 6 = 120/30 - Add the two like fractions:
105/30 + 120/30 = 105 + 120/30 = 225/30 - 225/30 simplified gives 15/2
- So, 21/6 + 20/5 = 15/2
In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+20/5 21/6+40/5 21/12+20/5 21/6+20/10 63/6+20/5 21/6+60/5 21/18+20/5 21/6+20/15 21/30+20/5 21/6+20/25 21/42+20/5 21/6+20/35