126% is the change from 400 to 904
Calculation steps:
[( 904 - 400 ) ÷ 400] x 100 = 126%
Formula
Percentage change = [(904 - 400) / 400] x 100
Subtract the new number by the original number
904 - 400 = 504
504 ÷ 400 = 1.26
1.26 x 100 = 126%
Example