34.09% is the change from 396 to 531
Calculation steps:
[( 531 - 396 ) ÷ 396] x 100 = 34.09%
Formula
Percentage change = [(531 - 396) / 396] x 100
Subtract the new number by the original number
531 - 396 = 135
135 ÷ 396 = 0.3409090909090909
0.3409090909090909 x 100 = 34.09%