Question

What's the sum of 2⁄5 and 2⁄4?

Answer 1

We need them to have the same denominator so let's change it to 20.

8/20+10/20=18/20=9/10

Answer 2

2/5 + 2/4

8/20 = 10/20

8/20 + 10/20 = 18/20

18/20 = 9/10

9/10 = 0.9

Your answer is 9/10 or 0.9


Hope I helped! 

Let me know if you need anything else

~ Zoe