3.71% is the change from 835 to 866
Calculation steps:
[( 866 - 835 ) ÷ 835] x 100 = 3.71%
Formula
Percentage change = [(866 - 835) / 835] x 100
Subtract the new number by the original number
866 - 835 = 31
31 ÷ 835 = 0.037125748502994015
0.037125748502994015 x 100 = 3.71%