57.1% is the change from 324 to 509
Calculation steps:
[( 509 - 324 ) ÷ 324] x 100 = 57.1%
Formula
Percentage change = [(509 - 324) / 324] x 100
Subtract the new number by the original number
509 - 324 = 185
185 ÷ 324 = 0.5709876543209876
0.5709876543209876 x 100 = 57.1%