81.17% is the change from 478 to 866
Calculation steps:
[( 866 - 478 ) ÷ 478] x 100 = 81.17%
Formula
Percentage change = [(866 - 478) / 478] x 100
Subtract the new number by the original number
866 - 478 = 388
388 ÷ 478 = 0.8117154811715481
0.8117154811715481 x 100 = 81.17%