Add 28/10 and 9/20
1st number: 2 8/10, 2nd number: 9/20
28/10 + 9/20 is 13/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
28/10 = 28 × 2/10 × 2 = 56/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
9/20 = 9 × 1/20 × 1 = 9/20 - Add the two like fractions:
56/20 + 9/20 = 56 + 9/20 = 65/20 - 65/20 simplified gives 13/4
- So, 28/10 + 9/20 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/10+9/20 28/10+18/20 28/20+9/20 28/10+9/40 84/10+9/20 28/10+27/20 28/30+9/20 28/10+9/60 28/10+45/20 28/50+9/20 28/10+63/20 28/70+9/20