3800% is the change from 2 to 78
Calculation steps:
[( 78 - 2 ) ÷ 2] x 100 = 3800%
Formula
Percentage change = [(78 - 2) / 2] x 100
Subtract the new number by the original number
78 - 2 = 76
76 ÷ 2 = 38
38 x 100 = 3800%
Example