102.83% is the change from 318 to 645
Calculation steps:
[( 645 - 318 ) ÷ 318] x 100 = 102.83%
Formula
Percentage change = [(645 - 318) / 318] x 100
Subtract the new number by the original number
645 - 318 = 327
327 ÷ 318 = 1.028301886792453
1.028301886792453 x 100 = 102.83%