27.27% is the change from 66 to 84
Calculation steps:
[( 84 - 66 ) ÷ 66] x 100 = 27.27%
Formula
Percentage change = [(84 - 66) / 66] x 100
Subtract the new number by the original number
84 - 66 = 18
18 ÷ 66 = 0.2727272727272727
0.2727272727272727 x 100 = 27.27%