-0.72% is the change from 829 to 823
Calculation steps:
[( 823 - 829 ) ÷ 829] x 100 = -0.72%
Formula
Percentage change = [(823 - 829) / 829] x 100
Subtract the new number by the original number
823 - 829 = -6
-6 ÷ 829 = -0.007237635705669481
-0.007237635705669481 x 100 = -0.72%