Question

From 1980 through 1990, the population of Country X increased by 100 percent. From 1990 to 2000, The population increased by 50 percent. What was the combined increase for the period 1980-2000

A. 150%
B. 166 2/3%
C.175%
D.200%

Answer 1

Answer:200 %

Explanation:

From 1980 to 1990 population increased by 100%

Let us Say initial population be x

therefore 100 % increase means it increases to 2x

From 1990 to 2000 population increased by 50%

i.e.
`2x * 1.5=3x`

Total increase from 1980 to 2000

`(3x-x)/(x)* 100=200\%`

Answer 2

D. 200%
In 1990 the value of population is 200% (100% + 100%), therefore the 50% increase is 100%, meaning the total is 200%