56.31% is the change from 531 to 830
Calculation steps:
[( 830 - 531 ) ÷ 531] x 100 = 56.31%
Formula
Percentage change = [(830 - 531) / 531] x 100
Subtract the new number by the original number
830 - 531 = 299
299 ÷ 531 = 0.5630885122410546
0.5630885122410546 x 100 = 56.31%