21.34% is the change from 328 to 398
Calculation steps:
[( 398 - 328 ) ÷ 328] x 100 = 21.34%
Formula
Percentage change = [(398 - 328) / 328] x 100
Subtract the new number by the original number
398 - 328 = 70
70 ÷ 328 = 0.21341463414634146
0.21341463414634146 x 100 = 21.34%