2.42% is the change from 866 to 887
Calculation steps:
[( 887 - 866 ) ÷ 866] x 100 = 2.42%
Formula
Percentage change = [(887 - 866) / 866] x 100
Subtract the new number by the original number
887 - 866 = 21
21 ÷ 866 = 0.02424942263279446
0.02424942263279446 x 100 = 2.42%