6.06% is the change from 396 to 420
Calculation steps:
[( 420 - 396 ) ÷ 396] x 100 = 6.06%
Formula
Percentage change = [(420 - 396) / 396] x 100
Subtract the new number by the original number
420 - 396 = 24
24 ÷ 396 = 0.06060606060606061
0.06060606060606061 x 100 = 6.06%