-13.43% is the change from 990 to 857
Calculation steps:
[( 857 - 990 ) ÷ 990] x 100 = -13.43%
Formula
Percentage change = [(857 - 990) / 990] x 100
Subtract the new number by the original number
857 - 990 = -133
-133 ÷ 990 = -0.13434343434343435
-0.13434343434343435 x 100 = -13.43%