96.32% is the change from 326 to 640
Calculation steps:
[( 640 - 326 ) ÷ 326] x 100 = 96.32%
Formula
Percentage change = [(640 - 326) / 326] x 100
Subtract the new number by the original number
640 - 326 = 314
314 ÷ 326 = 0.9631901840490797
0.9631901840490797 x 100 = 96.32%