-9.31% is the change from 612 to 555
Calculation steps:
[( 555 - 612 ) ÷ 612] x 100 = -9.31%
Formula
Percentage change = [(555 - 612) / 612] x 100
Subtract the new number by the original number
555 - 612 = -57
-57 ÷ 612 = -0.09313725490196079
-0.09313725490196079 x 100 = -9.31%