-73.78% is the change from 328 to 86
Calculation steps:
[( 86 - 328 ) ÷ 328] x 100 = -73.78%
Formula
Percentage change = [(86 - 328) / 328] x 100
Subtract the new number by the original number
86 - 328 = -242
-242 ÷ 328 = -0.7378048780487805
-0.7378048780487805 x 100 = -73.78%