-18.25% is the change from 389 to 318
Calculation steps:
[( 318 - 389 ) ÷ 389] x 100 = -18.25%
Formula
Percentage change = [(318 - 389) / 389] x 100
Subtract the new number by the original number
318 - 389 = -71
-71 ÷ 389 = -0.18251928020565553
-0.18251928020565553 x 100 = -18.25%