30500% is the change from 2 to 612
Calculation steps:
[( 612 - 2 ) ÷ 2] x 100 = 30500%
Formula
Percentage change = [(612 - 2) / 2] x 100
Subtract the new number by the original number
612 - 2 = 610
610 ÷ 2 = 305
305 x 100 = 30500%
Example