-41.5% is the change from 1000 to 585
Calculation steps:
[( 585 - 1000 ) ÷ 1000] x 100 = -41.5%
Formula
Percentage change = [(585 - 1000) / 1000] x 100
Subtract the new number by the original number
585 - 1000 = -415
-415 ÷ 1000 = -0.415
-0.415 x 100 = -41.5%