-98.18% is the change from 988 to 18
Calculation steps:
[( 18 - 988 ) ÷ 988] x 100 = -98.18%
Formula
Percentage change = [(18 - 988) / 988] x 100
Subtract the new number by the original number
18 - 988 = -970
-970 ÷ 988 = -0.9817813765182186
-0.9817813765182186 x 100 = -98.18%