-17.48% is the change from 389 to 321
Calculation steps:
[( 321 - 389 ) ÷ 389] x 100 = -17.48%
Formula
Percentage change = [(321 - 389) / 389] x 100
Subtract the new number by the original number
321 - 389 = -68
-68 ÷ 389 = -0.17480719794344474
-0.17480719794344474 x 100 = -17.48%