-50.16% is the change from 624 to 311
Calculation steps:
[( 311 - 624 ) ÷ 624] x 100 = -50.16%
Formula
Percentage change = [(311 - 624) / 624] x 100
Subtract the new number by the original number
311 - 624 = -313
-313 ÷ 624 = -0.5016025641025641
-0.5016025641025641 x 100 = -50.16%