-31.5% is the change from 800 to 548
Calculation steps:
[( 548 - 800 ) ÷ 800] x 100 = -31.5%
Formula
Percentage change = [(548 - 800) / 800] x 100
Subtract the new number by the original number
548 - 800 = -252
-252 ÷ 800 = -0.315
-0.315 x 100 = -31.5%