-42.38% is the change from 866 to 499
Calculation steps:
[( 499 - 866 ) ÷ 866] x 100 = -42.38%
Formula
Percentage change = [(499 - 866) / 866] x 100
Subtract the new number by the original number
499 - 866 = -367
-367 ÷ 866 = -0.4237875288683603
-0.4237875288683603 x 100 = -42.38%