-97.44% is the change from 663 to 17
Calculation steps:
[( 17 - 663 ) ÷ 663] x 100 = -97.44%
Formula
Percentage change = [(17 - 663) / 663] x 100
Subtract the new number by the original number
17 - 663 = -646
-646 ÷ 663 = -0.9743589743589743
-0.9743589743589743 x 100 = -97.44%