-93.97% is the change from 663 to 40
Calculation steps:
[( 40 - 663 ) ÷ 663] x 100 = -93.97%
Formula
Percentage change = [(40 - 663) / 663] x 100
Subtract the new number by the original number
40 - 663 = -623
-623 ÷ 663 = -0.9396681749622926
-0.9396681749622926 x 100 = -93.97%