5673.33% is the change from 15 to 866
Calculation steps:
[( 866 - 15 ) ÷ 15] x 100 = 5673.33%
Formula
Percentage change = [(866 - 15) / 15] x 100
Subtract the new number by the original number
866 - 15 = 851
851 ÷ 15 = 56.733333333333334
56.733333333333334 x 100 = 5673.33%