-19.71% is the change from 832 to 668
Calculation steps:
[( 668 - 832 ) ÷ 832] x 100 = -19.71%
Formula
Percentage change = [(668 - 832) / 832] x 100
Subtract the new number by the original number
668 - 832 = -164
-164 ÷ 832 = -0.1971153846153846
-0.1971153846153846 x 100 = -19.71%