-0.17% is the change from 591 to 590
Calculation steps:
[( 590 - 591 ) ÷ 591] x 100 = -0.17%
Formula
Percentage change = [(590 - 591) / 591] x 100
Subtract the new number by the original number
590 - 591 = -1
-1 ÷ 591 = -0.001692047377326565
-0.001692047377326565 x 100 = -0.17%