-19.64% is the change from 825 to 663
Calculation steps:
[( 663 - 825 ) ÷ 825] x 100 = -19.64%
Formula
Percentage change = [(663 - 825) / 825] x 100
Subtract the new number by the original number
663 - 825 = -162
-162 ÷ 825 = -0.19636363636363635
-0.19636363636363635 x 100 = -19.64%