-74.44% is the change from 313 to 80
Calculation steps:
[( 80 - 313 ) ÷ 313] x 100 = -74.44%
Formula
Percentage change = [(80 - 313) / 313] x 100
Subtract the new number by the original number
80 - 313 = -233
-233 ÷ 313 = -0.744408945686901
-0.744408945686901 x 100 = -74.44%