37.5% is the change from 328 to 451
Calculation steps:
[( 451 - 328 ) ÷ 328] x 100 = 37.5%
Formula
Percentage change = [(451 - 328) / 328] x 100
Subtract the new number by the original number
451 - 328 = 123
123 ÷ 328 = 0.375
0.375 x 100 = 37.5%
Example