-80.54% is the change from 853 to 166
Calculation steps:
[( 166 - 853 ) ÷ 853] x 100 = -80.54%
Formula
Percentage change = [(166 - 853) / 853] x 100
Subtract the new number by the original number
166 - 853 = -687
-687 ÷ 853 = -0.8053927315357562
-0.8053927315357562 x 100 = -80.54%