-9.39% is the change from 990 to 897
Calculation steps:
[( 897 - 990 ) ÷ 990] x 100 = -9.39%
Formula
Percentage change = [(897 - 990) / 990] x 100
Subtract the new number by the original number
897 - 990 = -93
-93 ÷ 990 = -0.09393939393939393
-0.09393939393939393 x 100 = -9.39%