-10.63% is the change from 668 to 597
Calculation steps:
[( 597 - 668 ) ÷ 668] x 100 = -10.63%
Formula
Percentage change = [(597 - 668) / 668] x 100
Subtract the new number by the original number
597 - 668 = -71
-71 ÷ 668 = -0.1062874251497006
-0.1062874251497006 x 100 = -10.63%