8.43% is the change from 866 to 939
Calculation steps:
[( 939 - 866 ) ÷ 866] x 100 = 8.43%
Formula
Percentage change = [(939 - 866) / 866] x 100
Subtract the new number by the original number
939 - 866 = 73
73 ÷ 866 = 0.08429561200923788
0.08429561200923788 x 100 = 8.43%