-69.51% is the change from 328 to 100
Calculation steps:
[( 100 - 328 ) ÷ 328] x 100 = -69.51%
Formula
Percentage change = [(100 - 328) / 328] x 100
Subtract the new number by the original number
100 - 328 = -228
-228 ÷ 328 = -0.6951219512195121
-0.6951219512195121 x 100 = -69.51%