-30.3% is the change from 660 to 460
Calculation steps:
[( 460 - 660 ) ÷ 660] x 100 = -30.3%
Formula
Percentage change = [(460 - 660) / 660] x 100
Subtract the new number by the original number
460 - 660 = -200
-200 ÷ 660 = -0.30303030303030304
-0.30303030303030304 x 100 = -30.3%