-75.61% is the change from 328 to 80
Calculation steps:
[( 80 - 328 ) ÷ 328] x 100 = -75.61%
Formula
Percentage change = [(80 - 328) / 328] x 100
Subtract the new number by the original number
80 - 328 = -248
-248 ÷ 328 = -0.7560975609756098
-0.7560975609756098 x 100 = -75.61%