-90.98% is the change from 898 to 81
Calculation steps:
[( 81 - 898 ) ÷ 898] x 100 = -90.98%
Formula
Percentage change = [(81 - 898) / 898] x 100
Subtract the new number by the original number
81 - 898 = -817
-817 ÷ 898 = -0.9097995545657016
-0.9097995545657016 x 100 = -90.98%