-99.09% is the change from 987 to 9
Calculation steps:
[( 9 - 987 ) ÷ 987] x 100 = -99.09%
Formula
Percentage change = [(9 - 987) / 987] x 100
Subtract the new number by the original number
9 - 987 = -978
-978 ÷ 987 = -0.9908814589665653
-0.9908814589665653 x 100 = -99.09%