-74.57% is the change from 810 to 206
Calculation steps:
[( 206 - 810 ) ÷ 810] x 100 = -74.57%
Formula
Percentage change = [(206 - 810) / 810] x 100
Subtract the new number by the original number
206 - 810 = -604
-604 ÷ 810 = -0.745679012345679
-0.745679012345679 x 100 = -74.57%