I need help making a whole number a percent

Question

During the last 10 years, the population of a town increased from 6000 to 10,320. What present increase does this represent?

Answer 1

10,320 new total - 6000 original = 4320 population increase

 

4320 / 6000 (since that is the original population) = 0.72, which translates into 72%