50.45% is the change from 555 to 835
Calculation steps:
[( 835 - 555 ) ÷ 555] x 100 = 50.45%
Formula
Percentage change = [(835 - 555) / 555] x 100
Subtract the new number by the original number
835 - 555 = 280
280 ÷ 555 = 0.5045045045045045
0.5045045045045045 x 100 = 50.45%