-73.86% is the change from 306 to 80
Calculation steps:
[( 80 - 306 ) ÷ 306] x 100 = -73.86%
Formula
Percentage change = [(80 - 306) / 306] x 100
Subtract the new number by the original number
80 - 306 = -226
-226 ÷ 306 = -0.738562091503268
-0.738562091503268 x 100 = -73.86%