-90.61% is the change from 969 to 91
Calculation steps:
[( 91 - 969 ) ÷ 969] x 100 = -90.61%
Formula
Percentage change = [(91 - 969) / 969] x 100
Subtract the new number by the original number
91 - 969 = -878
-878 ÷ 969 = -0.9060887512899897
-0.9060887512899897 x 100 = -90.61%