31100% is the change from 2 to 624
Calculation steps:
[( 624 - 2 ) ÷ 2] x 100 = 31100%
Formula
Percentage change = [(624 - 2) / 2] x 100
Subtract the new number by the original number
624 - 2 = 622
622 ÷ 2 = 311
311 x 100 = 31100%
Example