1850% is the change from 2 to 39
Calculation steps:
[( 39 - 2 ) ÷ 2] x 100 = 1850%
Formula
Percentage change = [(39 - 2) / 2] x 100
Subtract the new number by the original number
39 - 2 = 37
37 ÷ 2 = 18.5
18.5 x 100 = 1850%
Example