-18.07% is the change from 548 to 449
Calculation steps:
[( 449 - 548 ) ÷ 548] x 100 = -18.07%
Formula
Percentage change = [(449 - 548) / 548] x 100
Subtract the new number by the original number
449 - 548 = -99
-99 ÷ 548 = -0.18065693430656934
-0.18065693430656934 x 100 = -18.07%