8.67% is the change from 611 to 664
Calculation steps:
[( 664 - 611 ) ÷ 611] x 100 = 8.67%
Formula
Percentage change = [(664 - 611) / 611] x 100
Subtract the new number by the original number
664 - 611 = 53
53 ÷ 611 = 0.0867430441898527
0.0867430441898527 x 100 = 8.67%