-3.4% is the change from 852 to 823
Calculation steps:
[( 823 - 852 ) ÷ 852] x 100 = -3.4%
Formula
Percentage change = [(823 - 852) / 852] x 100
Subtract the new number by the original number
823 - 852 = -29
-29 ÷ 852 = -0.03403755868544601
-0.03403755868544601 x 100 = -3.4%