-3.02% is the change from 596 to 578
Calculation steps:
[( 578 - 596 ) ÷ 596] x 100 = -3.02%
Formula
Percentage change = [(578 - 596) / 596] x 100
Subtract the new number by the original number
578 - 596 = -18
-18 ÷ 596 = -0.030201342281879196
-0.030201342281879196 x 100 = -3.02%