29.55% is the change from 660 to 855
Calculation steps:
[( 855 - 660 ) ÷ 660] x 100 = 29.55%
Formula
Percentage change = [(855 - 660) / 660] x 100
Subtract the new number by the original number
855 - 660 = 195
195 ÷ 660 = 0.29545454545454547
0.29545454545454547 x 100 = 29.55%