-17.8% is the change from 545 to 448
Calculation steps:
[( 448 - 545 ) ÷ 545] x 100 = -17.8%
Formula
Percentage change = [(448 - 545) / 545] x 100
Subtract the new number by the original number
448 - 545 = -97
-97 ÷ 545 = -0.1779816513761468
-0.1779816513761468 x 100 = -17.8%