Add 40/2 and 21/20
1st number: 20 0/2, 2nd number: 1 1/20
40/2 + 21/20 is 421/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
40/2 = 40 × 10/2 × 10 = 400/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Add the two like fractions:
400/20 + 21/20 = 400 + 21/20 = 421/20 - So, 40/2 + 21/20 = 421/20
In mixed form: 211/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/2+21/20 40/2+42/20 40/4+21/20 40/2+21/40 40/2+63/20 40/6+21/20 40/2+21/60 40/10+21/20 40/14+21/20