910% is the change from 40 to 404
Calculation steps:
[( 404 - 40 ) ÷ 40] x 100 = 910%
Formula
Percentage change = [(404 - 40) / 40] x 100
Subtract the new number by the original number
404 - 40 = 364
364 ÷ 40 = 9.1
9.1 x 100 = 910%
Example