-89.86% is the change from 897 to 91
Calculation steps:
[( 91 - 897 ) ÷ 897] x 100 = -89.86%
Formula
Percentage change = [(91 - 897) / 897] x 100
Subtract the new number by the original number
91 - 897 = -806
-806 ÷ 897 = -0.8985507246376812
-0.8985507246376812 x 100 = -89.86%