-50.32% is the change from 618 to 307
Calculation steps:
[( 307 - 618 ) ÷ 618] x 100 = -50.32%
Formula
Percentage change = [(307 - 618) / 618] x 100
Subtract the new number by the original number
307 - 618 = -311
-311 ÷ 618 = -0.5032362459546925
-0.5032362459546925 x 100 = -50.32%