-9.9% is the change from 919 to 828
Calculation steps:
[( 828 - 919 ) ÷ 919] x 100 = -9.9%
Formula
Percentage change = [(828 - 919) / 919] x 100
Subtract the new number by the original number
828 - 919 = -91
-91 ÷ 919 = -0.09902067464635474
-0.09902067464635474 x 100 = -9.9%