-2.54% is the change from 827 to 806
Calculation steps:
[( 806 - 827 ) ÷ 827] x 100 = -2.54%
Formula
Percentage change = [(806 - 827) / 827] x 100
Subtract the new number by the original number
806 - 827 = -21
-21 ÷ 827 = -0.02539298669891173
-0.02539298669891173 x 100 = -2.54%