-24.69% is the change from 810 to 610
Calculation steps:
[( 610 - 810 ) ÷ 810] x 100 = -24.69%
Formula
Percentage change = [(610 - 810) / 810] x 100
Subtract the new number by the original number
610 - 810 = -200
-200 ÷ 810 = -0.24691358024691357
-0.24691358024691357 x 100 = -24.69%