-40.51% is the change from 975 to 580
Calculation steps:
[( 580 - 975 ) ÷ 975] x 100 = -40.51%
Formula
Percentage change = [(580 - 975) / 975] x 100
Subtract the new number by the original number
580 - 975 = -395
-395 ÷ 975 = -0.40512820512820513
-0.40512820512820513 x 100 = -40.51%