-93.41% is the change from 91 to 6
Calculation steps:
[( 6 - 91 ) ÷ 91] x 100 = -93.41%
Formula
Percentage change = [(6 - 91) / 91] x 100
Subtract the new number by the original number
6 - 91 = -85
-85 ÷ 91 = -0.9340659340659341
-0.9340659340659341 x 100 = -93.41%