27.1% is the change from 668 to 849
Calculation steps:
[( 849 - 668 ) ÷ 668] x 100 = 27.1%
Formula
Percentage change = [(849 - 668) / 668] x 100
Subtract the new number by the original number
849 - 668 = 181
181 ÷ 668 = 0.27095808383233533
0.27095808383233533 x 100 = 27.1%