-9.57% is the change from 899 to 813
Calculation steps:
[( 813 - 899 ) ÷ 899] x 100 = -9.57%
Formula
Percentage change = [(813 - 899) / 899] x 100
Subtract the new number by the original number
813 - 899 = -86
-86 ÷ 899 = -0.09566184649610679
-0.09566184649610679 x 100 = -9.57%