-8.61% is the change from 906 to 828
Calculation steps:
[( 828 - 906 ) ÷ 906] x 100 = -8.61%
Formula
Percentage change = [(828 - 906) / 906] x 100
Subtract the new number by the original number
828 - 906 = -78
-78 ÷ 906 = -0.08609271523178808
-0.08609271523178808 x 100 = -8.61%