65.15% is the change from 66 to 109
Calculation steps:
[( 109 - 66 ) ÷ 66] x 100 = 65.15%
Formula
Percentage change = [(109 - 66) / 66] x 100
Subtract the new number by the original number
109 - 66 = 43
43 ÷ 66 = 0.6515151515151515
0.6515151515151515 x 100 = 65.15%