-54% is the change from 663 to 305
Calculation steps:
[( 305 - 663 ) ÷ 663] x 100 = -54%
Formula
Percentage change = [(305 - 663) / 663] x 100
Subtract the new number by the original number
305 - 663 = -358
-358 ÷ 663 = -0.5399698340874811
-0.5399698340874811 x 100 = -54%