Add 21/8 and 6/20
1st number: 2 5/8, 2nd number: 6/20
21/8 + 6/20 is 117/40.
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,
21/8 = 21 × 5/8 × 5 = 105/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
6/20 = 6 × 2/20 × 2 = 12/40 - Add the two like fractions:
105/40 + 12/40 = 105 + 12/40 = 117/40 - So, 21/8 + 6/20 = 117/40
In mixed form: 237/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+6/20 21/8+12/20 21/16+6/20 21/8+6/40 63/8+6/20 21/8+18/20 21/24+6/20 21/8+6/60 21/8+30/20 21/40+6/20 21/8+42/20 21/56+6/20