-40.48% is the change from 993 to 591
Calculation steps:
[( 591 - 993 ) ÷ 993] x 100 = -40.48%
Formula
Percentage change = [(591 - 993) / 993] x 100
Subtract the new number by the original number
591 - 993 = -402
-402 ÷ 993 = -0.40483383685800606
-0.40483383685800606 x 100 = -40.48%