-40.46% is the change from 991 to 590
Calculation steps:
[( 590 - 991 ) ÷ 991] x 100 = -40.46%
Formula
Percentage change = [(590 - 991) / 991] x 100
Subtract the new number by the original number
590 - 991 = -401
-401 ÷ 991 = -0.4046417759838547
-0.4046417759838547 x 100 = -40.46%