The population of a town doubled every 5 years from 1960 to 1975. What is the percentage increase in population in this period?

800% 400% 700% 600%

700%

1960 - 1975 → 15 years Let the population be 100 1960 - 65 → 200 1965 - 70 → 400 1970 - 75 → 800 We can see that the population has risen from 100 to 800 i.e. increased by 700 Percentage rise = \(\frac{700 }{100 }\) * 100 = 700%