-9.12% is the change from 899 to 817
Calculation steps:
[( 817 - 899 ) ÷ 899] x 100 = -9.12%
Formula
Percentage change = [(817 - 899) / 899] x 100
Subtract the new number by the original number
817 - 899 = -82
-82 ÷ 899 = -0.09121245828698554
-0.09121245828698554 x 100 = -9.12%