-2.61% is the change from 613 to 597
Calculation steps:
[( 597 - 613 ) ÷ 613] x 100 = -2.61%
Formula
Percentage change = [(597 - 613) / 613] x 100
Subtract the new number by the original number
597 - 613 = -16
-16 ÷ 613 = -0.026101141924959218
-0.026101141924959218 x 100 = -2.61%