Add 3/20 and 21/8
1st number: 3/20, 2nd number: 2 5/8
3/20 + 21/8 is 111/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
3/20 = 3 × 2/20 × 2 = 6/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
21/8 = 21 × 5/8 × 5 = 105/40 - Add the two like fractions:
6/40 + 105/40 = 6 + 105/40 = 111/40 - So, 3/20 + 21/8 = 111/40
In mixed form: 231/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+21/8 3/20+42/8 3/40+21/8 3/20+21/16 9/20+21/8 3/20+63/8 3/60+21/8 3/20+21/24 15/20+21/8 3/20+21/40 21/20+21/8 3/20+21/56