-28.96% is the change from 549 to 390
Calculation steps:
[( 390 - 549 ) ÷ 549] x 100 = -28.96%
Formula
Percentage change = [(390 - 549) / 549] x 100
Subtract the new number by the original number
390 - 549 = -159
-159 ÷ 549 = -0.2896174863387978
-0.2896174863387978 x 100 = -28.96%