-8.68% is the change from 899 to 821
Calculation steps:
[( 821 - 899 ) ÷ 899] x 100 = -8.68%
Formula
Percentage change = [(821 - 899) / 899] x 100
Subtract the new number by the original number
821 - 899 = -78
-78 ÷ 899 = -0.0867630700778643
-0.0867630700778643 x 100 = -8.68%