I don’t understand this, can you help me?

Answer:
Okay so,
Step-by-step explanation:
If 4$ equals 500 kronos (or whatever it was) then, you keep adding up until you get to 75% or get to 9000 kronos then you stop and whoever is closer to their target goal, saves the most per week.
Answer:
Eva
Step-by-step explanation:
The number of dollars equivalent to 9000 Kronas can be found from the proportion ...
dollars / (9000 Kronas) = $4 / (500 Kronas)
Multiplying by 9000 Kronas, we get ...
dollars = $4(9000/500) = $72
Annie is saving at the equivalent rate of $72 per week, so Eva's savings rate of $75 per week is higher.