-40.9% is the change from 555 to 328
Calculation steps:
[( 328 - 555 ) ÷ 555] x 100 = -40.9%
Formula
Percentage change = [(328 - 555) / 555] x 100
Subtract the new number by the original number
328 - 555 = -227
-227 ÷ 555 = -0.409009009009009
-0.409009009009009 x 100 = -40.9%