-73.04% is the change from 319 to 86
Calculation steps:
[( 86 - 319 ) ÷ 319] x 100 = -73.04%
Formula
Percentage change = [(86 - 319) / 319] x 100
Subtract the new number by the original number
86 - 319 = -233
-233 ÷ 319 = -0.7304075235109718
-0.7304075235109718 x 100 = -73.04%