28.05% is the change from 328 to 420
Calculation steps:
[( 420 - 328 ) ÷ 328] x 100 = 28.05%
Formula
Percentage change = [(420 - 328) / 328] x 100
Subtract the new number by the original number
420 - 328 = 92
92 ÷ 328 = 0.2804878048780488
0.2804878048780488 x 100 = 28.05%