-2.03% is the change from 839 to 822
Calculation steps:
[( 822 - 839 ) ÷ 839] x 100 = -2.03%
Formula
Percentage change = [(822 - 839) / 839] x 100
Subtract the new number by the original number
822 - 839 = -17
-17 ÷ 839 = -0.02026221692491061
-0.02026221692491061 x 100 = -2.03%