The population of a town increased by 20% between 1989 and 1995. If the population increased again by 10% from 1995 till 2003, what is the percentage increase in the
population between 1989 and 2003?

32 percent

Explanation:

Assume the town's population in 1989 is 100. In 1995 it will be 120. There's a 10% increase (12) from 1995 to 2003 so the population in 2003 is 132. The percentage increase from 1989 (100) to 2003 (132) is (132-100) / 100 = .32 or 32 percent.