-19.51% is the change from 405 to 326
Calculation steps:
[( 326 - 405 ) ÷ 405] x 100 = -19.51%
Formula
Percentage change = [(326 - 405) / 405] x 100
Subtract the new number by the original number
326 - 405 = -79
-79 ÷ 405 = -0.19506172839506172
-0.19506172839506172 x 100 = -19.51%