-99.08% is the change from 977 to 9
Calculation steps:
[( 9 - 977 ) ÷ 977] x 100 = -99.08%
Formula
Percentage change = [(9 - 977) / 977] x 100
Subtract the new number by the original number
9 - 977 = -968
-968 ÷ 977 = -0.9907881269191402
-0.9907881269191402 x 100 = -99.08%