-2.78% is the change from 828 to 805
Calculation steps:
[( 805 - 828 ) ÷ 828] x 100 = -2.78%
Formula
Percentage change = [(805 - 828) / 828] x 100
Subtract the new number by the original number
805 - 828 = -23
-23 ÷ 828 = -0.027777777777777776
-0.027777777777777776 x 100 = -2.78%