-89.62% is the change from 771 to 80
Calculation steps:
[( 80 - 771 ) ÷ 771] x 100 = -89.62%
Formula
Percentage change = [(80 - 771) / 771] x 100
Subtract the new number by the original number
80 - 771 = -691
-691 ÷ 771 = -0.8962386511024644
-0.8962386511024644 x 100 = -89.62%