27.99% is the change from 668 to 855
Calculation steps:
[( 855 - 668 ) ÷ 668] x 100 = 27.99%
Formula
Percentage change = [(855 - 668) / 668] x 100
Subtract the new number by the original number
855 - 668 = 187
187 ÷ 668 = 0.27994011976047906
0.27994011976047906 x 100 = 27.99%