-19.89% is the change from 548 to 439
Calculation steps:
[( 439 - 548 ) ÷ 548] x 100 = -19.89%
Formula
Percentage change = [(439 - 548) / 548] x 100
Subtract the new number by the original number
439 - 548 = -109
-109 ÷ 548 = -0.1989051094890511
-0.1989051094890511 x 100 = -19.89%