11.68% is the change from 591 to 660
Calculation steps:
[( 660 - 591 ) ÷ 591] x 100 = 11.68%
Formula
Percentage change = [(660 - 591) / 591] x 100
Subtract the new number by the original number
660 - 591 = 69
69 ÷ 591 = 0.116751269035533
0.116751269035533 x 100 = 11.68%