2% is the change from 400 to 408
Calculation steps:
[( 408 - 400 ) ÷ 400] x 100 = 2%
Formula
Percentage change = [(408 - 400) / 400] x 100
Subtract the new number by the original number
408 - 400 = 8
8 ÷ 400 = 0.02
0.02 x 100 = 2%
Example