-85.28% is the change from 618 to 91
Calculation steps:
[( 91 - 618 ) ÷ 618] x 100 = -85.28%
Formula
Percentage change = [(91 - 618) / 618] x 100
Subtract the new number by the original number
91 - 618 = -527
-527 ÷ 618 = -0.8527508090614887
-0.8527508090614887 x 100 = -85.28%