-11.68% is the change from 668 to 590
Calculation steps:
[( 590 - 668 ) ÷ 668] x 100 = -11.68%
Formula
Percentage change = [(590 - 668) / 668] x 100
Subtract the new number by the original number
590 - 668 = -78
-78 ÷ 668 = -0.11676646706586827
-0.11676646706586827 x 100 = -11.68%