Question 249128
The growth in population is 50,000-40,000=10,000.

Express the growth in popupation compared to the starting population, i.e. 10,000/40,000.  Reduce this fraction to lowest terms.  10,000/40,000=1/4.

Convert 1/4 to a decimal by dividing 1 by 4.  1/4 = .25.

Convert .25 to percent by multipying by 100 and putting a percent sign after the number.

So 1/4 = .25 = 25%