-17.45% is the change from 550 to 454
Calculation steps:
[( 454 - 550 ) ÷ 550] x 100 = -17.45%
Formula
Percentage change = [(454 - 550) / 550] x 100
Subtract the new number by the original number
454 - 550 = -96
-96 ÷ 550 = -0.17454545454545456
-0.17454545454545456 x 100 = -17.45%