-99.8% is the change from 993 to 2
Calculation steps:
[( 2 - 993 ) ÷ 993] x 100 = -99.8%
Formula
Percentage change = [(2 - 993) / 993] x 100
Subtract the new number by the original number
2 - 993 = -991
-991 ÷ 993 = -0.9979859013091642
-0.9979859013091642 x 100 = -99.8%