-11.09% is the change from 550 to 489
Calculation steps:
[( 489 - 550 ) ÷ 550] x 100 = -11.09%
Formula
Percentage change = [(489 - 550) / 550] x 100
Subtract the new number by the original number
489 - 550 = -61
-61 ÷ 550 = -0.11090909090909092
-0.11090909090909092 x 100 = -11.09%