-19.41% is the change from 407 to 328
Calculation steps:
[( 328 - 407 ) ÷ 407] x 100 = -19.41%
Formula
Percentage change = [(328 - 407) / 407] x 100
Subtract the new number by the original number
328 - 407 = -79
-79 ÷ 407 = -0.1941031941031941
-0.1941031941031941 x 100 = -19.41%