-85.25% is the change from 617 to 91
Calculation steps:
[( 91 - 617 ) ÷ 617] x 100 = -85.25%
Formula
Percentage change = [(91 - 617) / 617] x 100
Subtract the new number by the original number
91 - 617 = -526
-526 ÷ 617 = -0.8525121555915721
-0.8525121555915721 x 100 = -85.25%