-72.84% is the change from 810 to 220
Calculation steps:
[( 220 - 810 ) ÷ 810] x 100 = -72.84%
Formula
Percentage change = [(220 - 810) / 810] x 100
Subtract the new number by the original number
220 - 810 = -590
-590 ÷ 810 = -0.7283950617283951
-0.7283950617283951 x 100 = -72.84%