-2.96% is the change from 609 to 591
Calculation steps:
[( 591 - 609 ) ÷ 609] x 100 = -2.96%
Formula
Percentage change = [(591 - 609) / 609] x 100
Subtract the new number by the original number
591 - 609 = -18
-18 ÷ 609 = -0.029556650246305417
-0.029556650246305417 x 100 = -2.96%