-48.72% is the change from 624 to 320
Calculation steps:
[( 320 - 624 ) ÷ 624] x 100 = -48.72%
Formula
Percentage change = [(320 - 624) / 624] x 100
Subtract the new number by the original number
320 - 624 = -304
-304 ÷ 624 = -0.48717948717948717
-0.48717948717948717 x 100 = -48.72%