34.93% is the change from 604 to 815
Calculation steps:
[( 815 - 604 ) ÷ 604] x 100 = 34.93%
Formula
Percentage change = [(815 - 604) / 604] x 100
Subtract the new number by the original number
815 - 604 = 211
211 ÷ 604 = 0.34933774834437087
0.34933774834437087 x 100 = 34.93%