Respuesta :
Percent increase is a percent change that describes an increase in quantity
To determine percent increase we first find the amount of change
It is given:A tree grew from 4ft to 12ft in 3 years .
Amount of change =12-4=8 ft.
We use proportion to find percent increase.
[tex] \frac{percent Increase }{100} =\frac{Amount of change }{Original amount } [/tex]
Or ,[tex] \frac{Percent Increase }{100} =\frac{8}{4} [/tex]
Cross multiplying we have:
4 ( percent Increase )= 800
Dividing by 4 we have Percent change = 200
Percent Increase = 200%.