15.79% is the change from 57 to 66
Calculation steps:
[( 66 - 57 ) ÷ 57] x 100 = 15.79%
Formula
Percentage change = [(66 - 57) / 57] x 100
Subtract the new number by the original number
66 - 57 = 9
9 ÷ 57 = 0.15789473684210525
0.15789473684210525 x 100 = 15.79%