-75.23% is the change from 323 to 80
Calculation steps:
[( 80 - 323 ) ÷ 323] x 100 = -75.23%
Formula
Percentage change = [(80 - 323) / 323] x 100
Subtract the new number by the original number
80 - 323 = -243
-243 ÷ 323 = -0.7523219814241486
-0.7523219814241486 x 100 = -75.23%