-80.45% is the change from 839 to 164
Calculation steps:
[( 164 - 839 ) ÷ 839] x 100 = -80.45%
Formula
Percentage change = [(164 - 839) / 839] x 100
Subtract the new number by the original number
164 - 839 = -675
-675 ÷ 839 = -0.8045292014302742
-0.8045292014302742 x 100 = -80.45%