Answer:
300 or 3*10^2 The question isn't written so I can narrow the answer down to one. I think 300 is the best answer, but teachers can be weird.
Explanation:
300: 3 * 10^2
90000: 9 * 10^4
Ratio: Last year / this year
Ratio: 9*10^4/3*10^2
Ratio: 3 * 10^ (4- 2) You are dividing so the powers subtract. The numbers just divide.
Ratio: 3*10^2
Answer: Simply put the answer is 300. 90000 is 300 times larger than 300
I would use 300 as your answer, but your teach might want 3 * 10^2