-39.69% is the change from 849 to 512
Calculation steps:
[( 512 - 849 ) ÷ 849] x 100 = -39.69%
Formula
Percentage change = [(512 - 849) / 849] x 100
Subtract the new number by the original number
512 - 849 = -337
-337 ÷ 849 = -0.39693757361601884
-0.39693757361601884 x 100 = -39.69%