-40.4% is the change from 1000 to 596
Calculation steps:
[( 596 - 1000 ) ÷ 1000] x 100 = -40.4%
Formula
Percentage change = [(596 - 1000) / 1000] x 100
Subtract the new number by the original number
596 - 1000 = -404
-404 ÷ 1000 = -0.404
-0.404 x 100 = -40.4%