-31.94% is the change from 839 to 571
Calculation steps:
[( 571 - 839 ) ÷ 839] x 100 = -31.94%
Formula
Percentage change = [(571 - 839) / 839] x 100
Subtract the new number by the original number
571 - 839 = -268
-268 ÷ 839 = -0.31942789034564956
-0.31942789034564956 x 100 = -31.94%