-3.1% is the change from 613 to 594
Calculation steps:
[( 594 - 613 ) ÷ 613] x 100 = -3.1%
Formula
Percentage change = [(594 - 613) / 613] x 100
Subtract the new number by the original number
594 - 613 = -19
-19 ÷ 613 = -0.03099510603588907
-0.03099510603588907 x 100 = -3.1%