48.75% is the change from 558 to 830
Calculation steps:
[( 830 - 558 ) ÷ 558] x 100 = 48.75%
Formula
Percentage change = [(830 - 558) / 558] x 100
Subtract the new number by the original number
830 - 558 = 272
272 ÷ 558 = 0.4874551971326165
0.4874551971326165 x 100 = 48.75%