68.6% is the change from 500 to 843
Calculation steps:
[( 843 - 500 ) ÷ 500] x 100 = 68.6%
Formula
Percentage change = [(843 - 500) / 500] x 100
Subtract the new number by the original number
843 - 500 = 343
343 ÷ 500 = 0.686
0.686 x 100 = 68.6%
Example