-10.78% is the change from 668 to 596
Calculation steps:
[( 596 - 668 ) ÷ 668] x 100 = -10.78%
Formula
Percentage change = [(596 - 668) / 668] x 100
Subtract the new number by the original number
596 - 668 = -72
-72 ÷ 668 = -0.10778443113772455
-0.10778443113772455 x 100 = -10.78%