304% is the change from 100 to 404
Calculation steps:
[( 404 - 100 ) ÷ 100] x 100 = 304%
Formula
Percentage change = [(404 - 100) / 100] x 100
Subtract the new number by the original number
404 - 100 = 304
304 ÷ 100 = 3.04
3.04 x 100 = 304%
Example