3500% is the change from 2 to 72
Calculation steps:
[( 72 - 2 ) ÷ 2] x 100 = 3500%
Formula
Percentage change = [(72 - 2) / 2] x 100
Subtract the new number by the original number
72 - 2 = 70
70 ÷ 2 = 35
35 x 100 = 3500%
Example