6.25% is the change from 400 to 425
Calculation steps:
[( 425 - 400 ) ÷ 400] x 100 = 6.25%
Formula
Percentage change = [(425 - 400) / 400] x 100
Subtract the new number by the original number
425 - 400 = 25
25 ÷ 400 = 0.0625
0.0625 x 100 = 6.25%
Example