Answer:
Their total revenue the previous year was $54,000.
Step-by-step explanation:
This question can be solved by a simple rule of three.
This year revenue was $62,100. It was 15% more than last year, so 115% = 1.15 of last year. How much was the revenue last year, that is, 100% = 1?
62,100 - 1.15
x - 1



Their total revenue the previous year was $54,000.