275% is the change from 104 to 390
Calculation steps:
[( 390 - 104 ) ÷ 104] x 100 = 275%
Formula
Percentage change = [(390 - 104) / 104] x 100
Subtract the new number by the original number
390 - 104 = 286
286 ÷ 104 = 2.75
2.75 x 100 = 275%
Example