-3.1% is the change from 548 to 531
Calculation steps:
[( 531 - 548 ) ÷ 548] x 100 = -3.1%
Formula
Percentage change = [(531 - 548) / 548] x 100
Subtract the new number by the original number
531 - 548 = -17
-17 ÷ 548 = -0.03102189781021898
-0.03102189781021898 x 100 = -3.1%