Add 10/8 and 21/20
1st number: 1 2/8, 2nd number: 1 1/20
10/8 + 21/20 is 23/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
10/8 = 10 × 5/8 × 5 = 50/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
21/20 = 21 × 2/20 × 2 = 42/40 - Add the two like fractions:
50/40 + 42/40 = 50 + 42/40 = 92/40 - 92/40 simplified gives 23/10
- So, 10/8 + 21/20 = 23/10
In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/8+21/20 10/8+42/20 10/16+21/20 10/8+21/40 30/8+21/20 10/8+63/20 10/24+21/20 10/8+21/60 50/8+21/20 10/40+21/20 70/8+21/20 10/56+21/20