-32.76% is the change from 815 to 548
Calculation steps:
[( 548 - 815 ) ÷ 815] x 100 = -32.76%
Formula
Percentage change = [(548 - 815) / 815] x 100
Subtract the new number by the original number
548 - 815 = -267
-267 ÷ 815 = -0.3276073619631902
-0.3276073619631902 x 100 = -32.76%