Step-by-step explanation:

Try putting it on a timeline. It makes more sense that way :)
The most simple way is to get 8 questions right on a ten question test. 8q/10q = 80%.
Heya !
Given expression -

Subtracting 25 both sides ,

Dividing by 3 on both sides ,

Therefore ,
Answer:
10 days
Step-by-step explanation:
2/.2=10