-91.81% is the change from 977 to 80
Calculation steps:
[( 80 - 977 ) ÷ 977] x 100 = -91.81%
Formula
Percentage change = [(80 - 977) / 977] x 100
Subtract the new number by the original number
80 - 977 = -897
-897 ÷ 977 = -0.9181166837256909
-0.9181166837256909 x 100 = -91.81%