-19.7% is the change from 406 to 326
Calculation steps:
[( 326 - 406 ) ÷ 406] x 100 = -19.7%
Formula
Percentage change = [(326 - 406) / 406] x 100
Subtract the new number by the original number
326 - 406 = -80
-80 ÷ 406 = -0.19704433497536947
-0.19704433497536947 x 100 = -19.7%