-1.99% is the change from 603 to 591
Calculation steps:
[( 591 - 603 ) ÷ 603] x 100 = -1.99%
Formula
Percentage change = [(591 - 603) / 603] x 100
Subtract the new number by the original number
591 - 603 = -12
-12 ÷ 603 = -0.01990049751243781
-0.01990049751243781 x 100 = -1.99%