Question

One study found that the number of interest groups increased by what percentage between 1959 and 1995?

Answer 1

Percentage change in interest groups between 1959 (500) & 1995 (600) = 20%

Explanation:

Percentage change = Change ie (New - Old) x 100

Old value

Suppose -

Number of interest groups in 1959 = 500

Number of interest groups in 1995 = 600

Percentage change = [ (600 - 500) / 500 ] x 100

( 100 / 500 ) x 100 = 20%