-71.12% is the change from 277 to 80
Calculation steps:
[( 80 - 277 ) ÷ 277] x 100 = -71.12%
Formula
Percentage change = [(80 - 277) / 277] x 100
Subtract the new number by the original number
80 - 277 = -197
-197 ÷ 277 = -0.7111913357400722
-0.7111913357400722 x 100 = -71.12%