71.3% is the change from 324 to 555
Calculation steps:
[( 555 - 324 ) ÷ 324] x 100 = 71.3%
Formula
Percentage change = [(555 - 324) / 324] x 100
Subtract the new number by the original number
555 - 324 = 231
231 ÷ 324 = 0.7129629629629629
0.7129629629629629 x 100 = 71.3%