-16.41% is the change from 390 to 326
Calculation steps:
[( 326 - 390 ) ÷ 390] x 100 = -16.41%
Formula
Percentage change = [(326 - 390) / 390] x 100
Subtract the new number by the original number
326 - 390 = -64
-64 ÷ 390 = -0.1641025641025641
-0.1641025641025641 x 100 = -16.41%