-86.91% is the change from 611 to 80
Calculation steps:
[( 80 - 611 ) ÷ 611] x 100 = -86.91%
Formula
Percentage change = [(80 - 611) / 611] x 100
Subtract the new number by the original number
80 - 611 = -531
-531 ÷ 611 = -0.8690671031096563
-0.8690671031096563 x 100 = -86.91%