-2.53% is the change from 829 to 808
Calculation steps:
[( 808 - 829 ) ÷ 829] x 100 = -2.53%
Formula
Percentage change = [(808 - 829) / 829] x 100
Subtract the new number by the original number
808 - 829 = -21
-21 ÷ 829 = -0.025331724969843185
-0.025331724969843185 x 100 = -2.53%