Final answer:
Jane's salary before the 10% increase to $66,000 was $60,000. This was calculated by dividing her new salary by 1.10.
Step-by-step explanation:
The student is asking about a problem involving percentage change in salary. Jane received a 10% increase to her salary which afterwards was $66,000. To find out how much she earned before the raise, we need to consider that the increased salary represents 110% of her original salary. Meaning, the original salary is 100% and the raise is an additional 10% on top of that. Therefore, to calculate her salary before the raise, we divide her new salary by 1.10 (which represents the 110%).
Using the formula:
- Original Salary = New Salary / (1 + Percentage Raise)
- Original Salary = $66,000 / 1.10
- Original Salary = $60,000
So, Jane's salary before the 10% raise was $60,000.