-80.43% is the change from 833 to 163
Calculation steps:
[( 163 - 833 ) ÷ 833] x 100 = -80.43%
Formula
Percentage change = [(163 - 833) / 833] x 100
Subtract the new number by the original number
163 - 833 = -670
-670 ÷ 833 = -0.8043217286914766
-0.8043217286914766 x 100 = -80.43%