-9.28% is the change from 668 to 606
Calculation steps:
[( 606 - 668 ) ÷ 668] x 100 = -9.28%
Formula
Percentage change = [(606 - 668) / 668] x 100
Subtract the new number by the original number
606 - 668 = -62
-62 ÷ 668 = -0.09281437125748503
-0.09281437125748503 x 100 = -9.28%