Respuesta :

Answer: 9/20

Explanation: You find a common denominator which in this case would be 20, so you do 1/4(5)= 5/20 and 1/5(4)= 4/20 and then you add them together and get 9/20. Since you can not simplify this, you leave it as it is.
ririj50

Answer:

9/20

Step-by-step explanation:

1 + 1 =

4 5

Common denominator is 20 (5×4= 20)

1 = 20÷4=4 1 = 20÷5=4

4 1×5=5 5 1×4=4

5+4= 9

Answer= 9/20