-9.6% is the change from 906 to 819
Calculation steps:
[( 819 - 906 ) ÷ 906] x 100 = -9.6%
Formula
Percentage change = [(819 - 906) / 906] x 100
Subtract the new number by the original number
819 - 906 = -87
-87 ÷ 906 = -0.09602649006622517
-0.09602649006622517 x 100 = -9.6%