-79.43% is the change from 389 to 80
Calculation steps:
[( 80 - 389 ) ÷ 389] x 100 = -79.43%
Formula
Percentage change = [(80 - 389) / 389] x 100
Subtract the new number by the original number
80 - 389 = -309
-309 ÷ 389 = -0.794344473007712
-0.794344473007712 x 100 = -79.43%