-36.87% is the change from 811 to 512
Calculation steps:
[( 512 - 811 ) ÷ 811] x 100 = -36.87%
Formula
Percentage change = [(512 - 811) / 811] x 100
Subtract the new number by the original number
512 - 811 = -299
-299 ÷ 811 = -0.3686806411837238
-0.3686806411837238 x 100 = -36.87%