-95.78% is the change from 663 to 28
Calculation steps:
[( 28 - 663 ) ÷ 663] x 100 = -95.78%
Formula
Percentage change = [(28 - 663) / 663] x 100
Subtract the new number by the original number
28 - 663 = -635
-635 ÷ 663 = -0.9577677224736049
-0.9577677224736049 x 100 = -95.78%