-49.63% is the change from 812 to 409
Calculation steps:
[( 409 - 812 ) ÷ 812] x 100 = -49.63%
Formula
Percentage change = [(409 - 812) / 812] x 100
Subtract the new number by the original number
409 - 812 = -403
-403 ÷ 812 = -0.4963054187192118
-0.4963054187192118 x 100 = -49.63%