-0.49% is the change from 817 to 813
Calculation steps:
[( 813 - 817 ) ÷ 817] x 100 = -0.49%
Formula
Percentage change = [(813 - 817) / 817] x 100
Subtract the new number by the original number
813 - 817 = -4
-4 ÷ 817 = -0.004895960832313341
-0.004895960832313341 x 100 = -0.49%