500% is the change from 65 to 390
Calculation steps:
[( 390 - 65 ) ÷ 65] x 100 = 500%
Formula
Percentage change = [(390 - 65) / 65] x 100
Subtract the new number by the original number
390 - 65 = 325
325 ÷ 65 = 5
5 x 100 = 500%
Example