-48.06% is the change from 618 to 321
Calculation steps:
[( 321 - 618 ) ÷ 618] x 100 = -48.06%
Formula
Percentage change = [(321 - 618) / 618] x 100
Subtract the new number by the original number
321 - 618 = -297
-297 ÷ 618 = -0.48058252427184467
-0.48058252427184467 x 100 = -48.06%