-89.7% is the change from 990 to 102
Calculation steps:
[( 102 - 990 ) ÷ 990] x 100 = -89.7%
Formula
Percentage change = [(102 - 990) / 990] x 100
Subtract the new number by the original number
102 - 990 = -888
-888 ÷ 990 = -0.896969696969697
-0.896969696969697 x 100 = -89.7%