-48.63% is the change from 621 to 319
Calculation steps:
[( 319 - 621 ) ÷ 621] x 100 = -48.63%
Formula
Percentage change = [(319 - 621) / 621] x 100
Subtract the new number by the original number
319 - 621 = -302
-302 ÷ 621 = -0.4863123993558776
-0.4863123993558776 x 100 = -48.63%