105% is the change from 320 to 656
Calculation steps:
[( 656 - 320 ) ÷ 320] x 100 = 105%
Formula
Percentage change = [(656 - 320) / 320] x 100
Subtract the new number by the original number
656 - 320 = 336
336 ÷ 320 = 1.05
1.05 x 100 = 105%
Example