-48.48% is the change from 623 to 321
Calculation steps:
[( 321 - 623 ) ÷ 623] x 100 = -48.48%
Formula
Percentage change = [(321 - 623) / 623] x 100
Subtract the new number by the original number
321 - 623 = -302
-302 ÷ 623 = -0.48475120385232745
-0.48475120385232745 x 100 = -48.48%