-40.72% is the change from 663 to 393
Calculation steps:
[( 393 - 663 ) ÷ 663] x 100 = -40.72%
Formula
Percentage change = [(393 - 663) / 663] x 100
Subtract the new number by the original number
393 - 663 = -270
-270 ÷ 663 = -0.4072398190045249
-0.4072398190045249 x 100 = -40.72%