-50.48% is the change from 622 to 308
Calculation steps:
[( 308 - 622 ) ÷ 622] x 100 = -50.48%
Formula
Percentage change = [(308 - 622) / 622] x 100
Subtract the new number by the original number
308 - 622 = -314
-314 ÷ 622 = -0.5048231511254019
-0.5048231511254019 x 100 = -50.48%