-16.11% is the change from 391 to 328
Calculation steps:
[( 328 - 391 ) ÷ 391] x 100 = -16.11%
Formula
Percentage change = [(328 - 391) / 391] x 100
Subtract the new number by the original number
328 - 391 = -63
-63 ÷ 391 = -0.16112531969309463
-0.16112531969309463 x 100 = -16.11%