-80.91% is the change from 990 to 189
Calculation steps:
[( 189 - 990 ) ÷ 990] x 100 = -80.91%
Formula
Percentage change = [(189 - 990) / 990] x 100
Subtract the new number by the original number
189 - 990 = -801
-801 ÷ 990 = -0.8090909090909091
-0.8090909090909091 x 100 = -80.91%