-94.51% is the change from 328 to 18
Calculation steps:
[( 18 - 328 ) ÷ 328] x 100 = -94.51%
Formula
Percentage change = [(18 - 328) / 328] x 100
Subtract the new number by the original number
18 - 328 = -310
-310 ÷ 328 = -0.9451219512195121
-0.9451219512195121 x 100 = -94.51%