-99.63% is the change from 812 to 3
Calculation steps:
[( 3 - 812 ) ÷ 812] x 100 = -99.63%
Formula
Percentage change = [(3 - 812) / 812] x 100
Subtract the new number by the original number
3 - 812 = -809
-809 ÷ 812 = -0.9963054187192119
-0.9963054187192119 x 100 = -99.63%