283.65% is the change from 104 to 399
Calculation steps:
[( 399 - 104 ) ÷ 104] x 100 = 283.65%
Formula
Percentage change = [(399 - 104) / 104] x 100
Subtract the new number by the original number
399 - 104 = 295
295 ÷ 104 = 2.8365384615384617
2.8365384615384617 x 100 = 283.65%