405% is the change from 80 to 404
Calculation steps:
[( 404 - 80 ) ÷ 80] x 100 = 405%
Formula
Percentage change = [(404 - 80) / 80] x 100
Subtract the new number by the original number
404 - 80 = 324
324 ÷ 80 = 4.05
4.05 x 100 = 405%
Example