63.09% is the change from 531 to 866
Calculation steps:
[( 866 - 531 ) ÷ 531] x 100 = 63.09%
Formula
Percentage change = [(866 - 531) / 531] x 100
Subtract the new number by the original number
866 - 531 = 335
335 ÷ 531 = 0.6308851224105462
0.6308851224105462 x 100 = 63.09%