-6.7% is the change from 418 to 390
Calculation steps:
[( 390 - 418 ) ÷ 418] x 100 = -6.7%
Formula
Percentage change = [(390 - 418) / 418] x 100
Subtract the new number by the original number
390 - 418 = -28
-28 ÷ 418 = -0.06698564593301436
-0.06698564593301436 x 100 = -6.7%