Question

A town's population went from 25,800 to 42,600 in 15 years. What was the percent of changes?

Answer 1

42,600 - 25,800 = 16800. That is the increase in 15 years.

You then calculate the increase as a percentage of the original population; 25,800.

16,800 / 25,800 * 100 = 65.11%