Answer: 0.728%
Explanation:
In order to find this simply, we need to find what the increase was. We find this by finding the difference between prices: 9.69 - 9.62 = .07.
We can then find the percent by dividing the increase by the original price, and then multiplying by 100:
This can be rounded to whatever you need, I chose thousandths for my answer.
Hope this helps, if you need anything else explained please let me know.