97.56% is the change from 328 to 648
Calculation steps:
[( 648 - 328 ) ÷ 328] x 100 = 97.56%
Formula
Percentage change = [(648 - 328) / 328] x 100
Subtract the new number by the original number
648 - 328 = 320
320 ÷ 328 = 0.975609756097561
0.975609756097561 x 100 = 97.56%