-80.91% is the change from 833 to 159
Calculation steps:
[( 159 - 833 ) ÷ 833] x 100 = -80.91%
Formula
Percentage change = [(159 - 833) / 833] x 100
Subtract the new number by the original number
159 - 833 = -674
-674 ÷ 833 = -0.8091236494597839
-0.8091236494597839 x 100 = -80.91%