41.4% is the change from 587 to 830
Calculation steps:
[( 830 - 587 ) ÷ 587] x 100 = 41.4%
Formula
Percentage change = [(830 - 587) / 587] x 100
Subtract the new number by the original number
830 - 587 = 243
243 ÷ 587 = 0.41396933560477
0.41396933560477 x 100 = 41.4%