86.36% is the change from 66 to 123
Calculation steps:
[( 123 - 66 ) ÷ 66] x 100 = 86.36%
Formula
Percentage change = [(123 - 66) / 66] x 100
Subtract the new number by the original number
123 - 66 = 57
57 ÷ 66 = 0.8636363636363636
0.8636363636363636 x 100 = 86.36%