-53.79% is the change from 660 to 305
Calculation steps:
[( 305 - 660 ) ÷ 660] x 100 = -53.79%
Formula
Percentage change = [(305 - 660) / 660] x 100
Subtract the new number by the original number
305 - 660 = -355
-355 ÷ 660 = -0.5378787878787878
-0.5378787878787878 x 100 = -53.79%