-11.9% is the change from 630 to 555
Calculation steps:
[( 555 - 630 ) ÷ 630] x 100 = -11.9%
Formula
Percentage change = [(555 - 630) / 630] x 100
Subtract the new number by the original number
555 - 630 = -75
-75 ÷ 630 = -0.11904761904761904
-0.11904761904761904 x 100 = -11.9%