99.07% is the change from 324 to 645
Calculation steps:
[( 645 - 324 ) ÷ 324] x 100 = 99.07%
Formula
Percentage change = [(645 - 324) / 324] x 100
Subtract the new number by the original number
645 - 324 = 321
321 ÷ 324 = 0.9907407407407407
0.9907407407407407 x 100 = 99.07%