6.13% is the change from 816 to 866
Calculation steps:
[( 866 - 816 ) ÷ 816] x 100 = 6.13%
Formula
Percentage change = [(866 - 816) / 816] x 100
Subtract the new number by the original number
866 - 816 = 50
50 ÷ 816 = 0.061274509803921566
0.061274509803921566 x 100 = 6.13%