-74.28% is the change from 311 to 80
Calculation steps:
[( 80 - 311 ) ÷ 311] x 100 = -74.28%
Formula
Percentage change = [(80 - 311) / 311] x 100
Subtract the new number by the original number
80 - 311 = -231
-231 ÷ 311 = -0.7427652733118971
-0.7427652733118971 x 100 = -74.28%