-91.9% is the change from 988 to 80
Calculation steps:
[( 80 - 988 ) ÷ 988] x 100 = -91.9%
Formula
Percentage change = [(80 - 988) / 988] x 100
Subtract the new number by the original number
80 - 988 = -908
-908 ÷ 988 = -0.9190283400809717
-0.9190283400809717 x 100 = -91.9%