-81.03% is the change from 838 to 159
Calculation steps:
[( 159 - 838 ) ÷ 838] x 100 = -81.03%
Formula
Percentage change = [(159 - 838) / 838] x 100
Subtract the new number by the original number
159 - 838 = -679
-679 ÷ 838 = -0.8102625298329356
-0.8102625298329356 x 100 = -81.03%