Question

Last year, wind turbines along a hilly ridge had an average output of 530 kilowatt hours per year. The turbines were upgraded, and now their average annual output is 901 kilowatt hours. What is the percent of increase in the power output of the turbines?

Answer 1

Explanation:

To find the percent increase in power output, we need to first find the difference between the new and old power outputs, and then express that difference as a percentage of the old power output.

The difference between the new and old power outputs is:

901 - 530 = 371

To express this difference as a percentage of the old power output, we divide it by the old power output and multiply by 100:

(371/530) x 100 ≈ 70.0%

Therefore, the percent increase in power output is approximately 70.0%.