-40% is the change from 985 to 591
Calculation steps:
[( 591 - 985 ) ÷ 985] x 100 = -40%
Formula
Percentage change = [(591 - 985) / 985] x 100
Subtract the new number by the original number
591 - 985 = -394
-394 ÷ 985 = -0.4
-0.4 x 100 = -40%
Example