-9.15% is the change from 667 to 606
Calculation steps:
[( 606 - 667 ) ÷ 667] x 100 = -9.15%
Formula
Percentage change = [(606 - 667) / 667] x 100
Subtract the new number by the original number
606 - 667 = -61
-61 ÷ 667 = -0.09145427286356822
-0.09145427286356822 x 100 = -9.15%