-9.16% is the change from 666 to 605
Calculation steps:
[( 605 - 666 ) ÷ 666] x 100 = -9.16%
Formula
Percentage change = [(605 - 666) / 666] x 100
Subtract the new number by the original number
605 - 666 = -61
-61 ÷ 666 = -0.0915915915915916
-0.0915915915915916 x 100 = -9.16%