1.25% is the change from 400 to 405
Calculation steps:
[( 405 - 400 ) ÷ 400] x 100 = 1.25%
Formula
Percentage change = [(405 - 400) / 400] x 100
Subtract the new number by the original number
405 - 400 = 5
5 ÷ 400 = 0.0125
0.0125 x 100 = 1.25%
Example