4500% is the change from 21 to 966
Calculation steps:
[( 966 - 21 ) ÷ 21] x 100 = 4500%
Formula
Percentage change = [(966 - 21) / 21] x 100
Subtract the new number by the original number
966 - 21 = 945
945 ÷ 21 = 45
45 x 100 = 4500%
Example