-87.5% is the change from 328 to 41
Calculation steps:
[( 41 - 328 ) ÷ 328] x 100 = -87.5%
Formula
Percentage change = [(41 - 328) / 328] x 100
Subtract the new number by the original number
41 - 328 = -287
-287 ÷ 328 = -0.875
-0.875 x 100 = -87.5%
Example