-99.03% is the change from 930 to 9
Calculation steps:
[( 9 - 930 ) ÷ 930] x 100 = -99.03%
Formula
Percentage change = [(9 - 930) / 930] x 100
Subtract the new number by the original number
9 - 930 = -921
-921 ÷ 930 = -0.9903225806451613
-0.9903225806451613 x 100 = -99.03%