-93.84% is the change from 990 to 61
Calculation steps:
[( 61 - 990 ) ÷ 990] x 100 = -93.84%
Formula
Percentage change = [(61 - 990) / 990] x 100
Subtract the new number by the original number
61 - 990 = -929
-929 ÷ 990 = -0.9383838383838384
-0.9383838383838384 x 100 = -93.84%