-3.05% is the change from 591 to 573
Calculation steps:
[( 573 - 591 ) ÷ 591] x 100 = -3.05%
Formula
Percentage change = [(573 - 591) / 591] x 100
Subtract the new number by the original number
573 - 591 = -18
-18 ÷ 591 = -0.030456852791878174
-0.030456852791878174 x 100 = -3.05%