-84.31% is the change from 663 to 104
Calculation steps:
[( 104 - 663 ) ÷ 663] x 100 = -84.31%
Formula
Percentage change = [(104 - 663) / 663] x 100
Subtract the new number by the original number
104 - 663 = -559
-559 ÷ 663 = -0.8431372549019608
-0.8431372549019608 x 100 = -84.31%