-25.09% is the change from 829 to 621
Calculation steps:
[( 621 - 829 ) ÷ 829] x 100 = -25.09%
Formula
Percentage change = [(621 - 829) / 829] x 100
Subtract the new number by the original number
621 - 829 = -208
-208 ÷ 829 = -0.25090470446320867
-0.25090470446320867 x 100 = -25.09%