55.4% is the change from 556 to 864
Calculation steps:
[( 864 - 556 ) ÷ 556] x 100 = 55.4%
Formula
Percentage change = [(864 - 556) / 556] x 100
Subtract the new number by the original number
864 - 556 = 308
308 ÷ 556 = 0.5539568345323741
0.5539568345323741 x 100 = 55.4%