give solution

Question

The bushes in a hedge have grown 25% in height.What percentage of their current height needs to be trimmed off to return them to their former heights.

Answer 1

h = former height

1.25h = current height

 

You want to go from 1.25h to h, so the percent change is

 

100[(h - 1.25h)/(1.25h)] % = -20%

 

You need to trim the hedge by 20%.