-50.16% is the change from 622 to 310
Calculation steps:
[( 310 - 622 ) ÷ 622] x 100 = -50.16%
Formula
Percentage change = [(310 - 622) / 622] x 100
Subtract the new number by the original number
310 - 622 = -312
-312 ÷ 622 = -0.5016077170418006
-0.5016077170418006 x 100 = -50.16%