55.56% is the change from 324 to 504
Calculation steps:
[( 504 - 324 ) ÷ 324] x 100 = 55.56%
Formula
Percentage change = [(504 - 324) / 324] x 100
Subtract the new number by the original number
504 - 324 = 180
180 ÷ 324 = 0.5555555555555556
0.5555555555555556 x 100 = 55.56%