-19.83% is the change from 827 to 663
Calculation steps:
[( 663 - 827 ) ÷ 827] x 100 = -19.83%
Formula
Percentage change = [(663 - 827) / 827] x 100
Subtract the new number by the original number
663 - 827 = -164
-164 ÷ 827 = -0.19830713422007254
-0.19830713422007254 x 100 = -19.83%