-38.42% is the change from 812 to 500
Calculation steps:
[( 500 - 812 ) ÷ 812] x 100 = -38.42%
Formula
Percentage change = [(500 - 812) / 812] x 100
Subtract the new number by the original number
500 - 812 = -312
-312 ÷ 812 = -0.3842364532019704
-0.3842364532019704 x 100 = -38.42%