28.79% is the change from 66 to 85
Calculation steps:
[( 85 - 66 ) ÷ 66] x 100 = 28.79%
Formula
Percentage change = [(85 - 66) / 66] x 100
Subtract the new number by the original number
85 - 66 = 19
19 ÷ 66 = 0.2878787878787879
0.2878787878787879 x 100 = 28.79%