-39.96% is the change from 966 to 580
Calculation steps:
[( 580 - 966 ) ÷ 966] x 100 = -39.96%
Formula
Percentage change = [(580 - 966) / 966] x 100
Subtract the new number by the original number
580 - 966 = -386
-386 ÷ 966 = -0.3995859213250518
-0.3995859213250518 x 100 = -39.96%