103.7% is the change from 324 to 660
Calculation steps:
[( 660 - 324 ) ÷ 324] x 100 = 103.7%
Formula
Percentage change = [(660 - 324) / 324] x 100
Subtract the new number by the original number
660 - 324 = 336
336 ÷ 324 = 1.037037037037037
1.037037037037037 x 100 = 103.7%