33.5% is the change from 609 to 813
Calculation steps:
[( 813 - 609 ) ÷ 609] x 100 = 33.5%
Formula
Percentage change = [(813 - 609) / 609] x 100
Subtract the new number by the original number
813 - 609 = 204
204 ÷ 609 = 0.33497536945812806
0.33497536945812806 x 100 = 33.5%