30750% is the change from 2 to 617
Calculation steps:
[( 617 - 2 ) ÷ 2] x 100 = 30750%
Formula
Percentage change = [(617 - 2) / 2] x 100
Subtract the new number by the original number
617 - 2 = 615
615 ÷ 2 = 307.5
307.5 x 100 = 30750%
Example