-96.08% is the change from 663 to 26
Calculation steps:
[( 26 - 663 ) ÷ 663] x 100 = -96.08%
Formula
Percentage change = [(26 - 663) / 663] x 100
Subtract the new number by the original number
26 - 663 = -637
-637 ÷ 663 = -0.9607843137254902
-0.9607843137254902 x 100 = -96.08%