-2.6% is the change from 845 to 823
Calculation steps:
[( 823 - 845 ) ÷ 845] x 100 = -2.6%
Formula
Percentage change = [(823 - 845) / 845] x 100
Subtract the new number by the original number
823 - 845 = -22
-22 ÷ 845 = -0.02603550295857988
-0.02603550295857988 x 100 = -2.6%