-96.25% is the change from 80 to 3
Calculation steps:
[( 3 - 80 ) ÷ 80] x 100 = -96.25%
Formula
Percentage change = [(3 - 80) / 80] x 100
Subtract the new number by the original number
3 - 80 = -77
-77 ÷ 80 = -0.9625
-0.9625 x 100 = -96.25%
Example