-93.39% is the change from 998 to 66
Calculation steps:
[( 66 - 998 ) ÷ 998] x 100 = -93.39%
Formula
Percentage change = [(66 - 998) / 998] x 100
Subtract the new number by the original number
66 - 998 = -932
-932 ÷ 998 = -0.9338677354709419
-0.9338677354709419 x 100 = -93.39%