-43.84% is the change from 511 to 287
Calculation steps:
[( 287 - 511 ) ÷ 511] x 100 = -43.84%
Formula
Percentage change = [(287 - 511) / 511] x 100
Subtract the new number by the original number
287 - 511 = -224
-224 ÷ 511 = -0.4383561643835616
-0.4383561643835616 x 100 = -43.84%