55.68% is the change from 555 to 864
Calculation steps:
[( 864 - 555 ) ÷ 555] x 100 = 55.68%
Formula
Percentage change = [(864 - 555) / 555] x 100
Subtract the new number by the original number
864 - 555 = 309
309 ÷ 555 = 0.5567567567567567
0.5567567567567567 x 100 = 55.68%