The population of a town doubled every 5 years from 1960 to 1975. What is the percentage increase in population in this period?
Answer & explanation
Correct answer: option 3
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%