19400% is the change from 2 to 390
Calculation steps:
[( 390 - 2 ) ÷ 2] x 100 = 19400%
Formula
Percentage change = [(390 - 2) / 2] x 100
Subtract the new number by the original number
390 - 2 = 388
388 ÷ 2 = 194
194 x 100 = 19400%
Example