Add 40/4 and 21/5
1st number: 10 0/4, 2nd number: 4 1/5
40/4 + 21/5 is 71/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
40/4 = 40 × 5/4 × 5 = 200/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
21/5 = 21 × 4/5 × 4 = 84/20 - Add the two like fractions:
200/20 + 84/20 = 200 + 84/20 = 284/20 - 284/20 simplified gives 71/5
- So, 40/4 + 21/5 = 71/5
In mixed form: 141/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4+21/5 40/4+42/5 40/8+21/5 40/4+21/10 40/4+63/5 40/12+21/5 40/4+21/15 40/20+21/5 40/4+21/25 40/28+21/5 40/4+21/35