-90.97% is the change from 897 to 81
Calculation steps:
[( 81 - 897 ) ÷ 897] x 100 = -90.97%
Formula
Percentage change = [(81 - 897) / 897] x 100
Subtract the new number by the original number
81 - 897 = -816
-816 ÷ 897 = -0.9096989966555183
-0.9096989966555183 x 100 = -90.97%