-3.52% is the change from 853 to 823
Calculation steps:
[( 823 - 853 ) ÷ 853] x 100 = -3.52%
Formula
Percentage change = [(823 - 853) / 853] x 100
Subtract the new number by the original number
823 - 853 = -30
-30 ÷ 853 = -0.035169988276670575
-0.035169988276670575 x 100 = -3.52%