502.94% is the change from 136 to 820
Calculation steps:
[( 820 - 136 ) ÷ 136] x 100 = 502.94%
Formula
Percentage change = [(820 - 136) / 136] x 100
Subtract the new number by the original number
820 - 136 = 684
684 ÷ 136 = 5.029411764705882
5.029411764705882 x 100 = 502.94%