20% is the change from 325 to 390
Calculation steps:
[( 390 - 325 ) ÷ 325] x 100 = 20%
Formula
Percentage change = [(390 - 325) / 325] x 100
Subtract the new number by the original number
390 - 325 = 65
65 ÷ 325 = 0.2
0.2 x 100 = 20%
Example