-85.44% is the change from 618 to 90
Calculation steps:
[( 90 - 618 ) ÷ 618] x 100 = -85.44%
Formula
Percentage change = [(90 - 618) / 618] x 100
Subtract the new number by the original number
90 - 618 = -528
-528 ÷ 618 = -0.8543689320388349
-0.8543689320388349 x 100 = -85.44%