-20.55% is the change from 618 to 491
Calculation steps:
[( 491 - 618 ) ÷ 618] x 100 = -20.55%
Formula
Percentage change = [(491 - 618) / 618] x 100
Subtract the new number by the original number
491 - 618 = -127
-127 ÷ 618 = -0.20550161812297735
-0.20550161812297735 x 100 = -20.55%