-53.54% is the change from 663 to 308
Calculation steps:
[( 308 - 663 ) ÷ 663] x 100 = -53.54%
Formula
Percentage change = [(308 - 663) / 663] x 100
Subtract the new number by the original number
308 - 663 = -355
-355 ÷ 663 = -0.5354449472096531
-0.5354449472096531 x 100 = -53.54%