-29.73% is the change from 555 to 390
Calculation steps:
[( 390 - 555 ) ÷ 555] x 100 = -29.73%
Formula
Percentage change = [(390 - 555) / 555] x 100
Subtract the new number by the original number
390 - 555 = -165
-165 ÷ 555 = -0.2972972972972973
-0.2972972972972973 x 100 = -29.73%