-37.07% is the change from 812 to 511
Calculation steps:
[( 511 - 812 ) ÷ 812] x 100 = -37.07%
Formula
Percentage change = [(511 - 812) / 812] x 100
Subtract the new number by the original number
511 - 812 = -301
-301 ÷ 812 = -0.3706896551724138
-0.3706896551724138 x 100 = -37.07%