-50.32% is the change from 624 to 310
Calculation steps:
[( 310 - 624 ) ÷ 624] x 100 = -50.32%
Formula
Percentage change = [(310 - 624) / 624] x 100
Subtract the new number by the original number
310 - 624 = -314
-314 ÷ 624 = -0.5032051282051282
-0.5032051282051282 x 100 = -50.32%