90.83% is the change from 338 to 645
Calculation steps:
[( 645 - 338 ) ÷ 338] x 100 = 90.83%
Formula
Percentage change = [(645 - 338) / 338] x 100
Subtract the new number by the original number
645 - 338 = 307
307 ÷ 338 = 0.908284023668639
0.908284023668639 x 100 = 90.83%