-96.54% is the change from 839 to 29
Calculation steps:
[( 29 - 839 ) ÷ 839] x 100 = -96.54%
Formula
Percentage change = [(29 - 839) / 839] x 100
Subtract the new number by the original number
29 - 839 = -810
-810 ÷ 839 = -0.965435041716329
-0.965435041716329 x 100 = -96.54%