-23.28% is the change from 829 to 636
Calculation steps:
[( 636 - 829 ) ÷ 829] x 100 = -23.28%
Formula
Percentage change = [(636 - 829) / 829] x 100
Subtract the new number by the original number
636 - 829 = -193
-193 ÷ 829 = -0.23281061519903498
-0.23281061519903498 x 100 = -23.28%