9.31% is the change from 612 to 669
Calculation steps:
[( 669 - 612 ) ÷ 612] x 100 = 9.31%
Formula
Percentage change = [(669 - 612) / 612] x 100
Subtract the new number by the original number
669 - 612 = 57
57 ÷ 612 = 0.09313725490196079
0.09313725490196079 x 100 = 9.31%