-81.26% is the change from 427 to 80
Calculation steps:
[( 80 - 427 ) ÷ 427] x 100 = -81.26%
Formula
Percentage change = [(80 - 427) / 427] x 100
Subtract the new number by the original number
80 - 427 = -347
-347 ÷ 427 = -0.8126463700234192
-0.8126463700234192 x 100 = -81.26%