-99.02% is the change from 920 to 9
Calculation steps:
[( 9 - 920 ) ÷ 920] x 100 = -99.02%
Formula
Percentage change = [(9 - 920) / 920] x 100
Subtract the new number by the original number
9 - 920 = -911
-911 ÷ 920 = -0.9902173913043478
-0.9902173913043478 x 100 = -99.02%