-41.34% is the change from 999 to 586
Calculation steps:
[( 586 - 999 ) ÷ 999] x 100 = -41.34%
Formula
Percentage change = [(586 - 999) / 999] x 100
Subtract the new number by the original number
586 - 999 = -413
-413 ÷ 999 = -0.4134134134134134
-0.4134134134134134 x 100 = -41.34%