On January 4, 1977 the price of a sprocket was $37.47. On January 4, 2020 the price of a sprocket was $32.10. Find the average rate of change in the price of a sprocket from 1977 to 2020. Round to the nearest cent.

The average rate of change is $LaTeX: \displaystyle \frac{32.10-37.47}{2020-1977}= -0.12$ dollars per year.