-20.31% is the change from 832 to 663
Calculation steps:
[( 663 - 832 ) ÷ 832] x 100 = -20.31%
Formula
Percentage change = [(663 - 832) / 832] x 100
Subtract the new number by the original number
663 - 832 = -169
-169 ÷ 832 = -0.203125
-0.203125 x 100 = -20.31%