-84.47% is the change from 586 to 91
Calculation steps:
[( 91 - 586 ) ÷ 586] x 100 = -84.47%
Formula
Percentage change = [(91 - 586) / 586] x 100
Subtract the new number by the original number
91 - 586 = -495
-495 ÷ 586 = -0.8447098976109215
-0.8447098976109215 x 100 = -84.47%