-52.83% is the change from 829 to 391
Calculation steps:
[( 391 - 829 ) ÷ 829] x 100 = -52.83%
Formula
Percentage change = [(391 - 829) / 829] x 100
Subtract the new number by the original number
391 - 829 = -438
-438 ÷ 829 = -0.5283474065138721
-0.5283474065138721 x 100 = -52.83%