55.11% is the change from 323 to 501
Calculation steps:
[( 501 - 323 ) ÷ 323] x 100 = 55.11%
Formula
Percentage change = [(501 - 323) / 323] x 100
Subtract the new number by the original number
501 - 323 = 178
178 ÷ 323 = 0.5510835913312694
0.5510835913312694 x 100 = 55.11%