-39.26% is the change from 843 to 512
Calculation steps:
[( 512 - 843 ) ÷ 843] x 100 = -39.26%
Formula
Percentage change = [(512 - 843) / 843] x 100
Subtract the new number by the original number
512 - 843 = -331
-331 ÷ 843 = -0.3926453143534994
-0.3926453143534994 x 100 = -39.26%