-6.89% is the change from 668 to 622
Calculation steps:
[( 622 - 668 ) ÷ 668] x 100 = -6.89%
Formula
Percentage change = [(622 - 668) / 668] x 100
Subtract the new number by the original number
622 - 668 = -46
-46 ÷ 668 = -0.0688622754491018
-0.0688622754491018 x 100 = -6.89%