-99.02% is the change from 915 to 9
Calculation steps:
[( 9 - 915 ) ÷ 915] x 100 = -99.02%
Formula
Percentage change = [(9 - 915) / 915] x 100
Subtract the new number by the original number
9 - 915 = -906
-906 ÷ 915 = -0.9901639344262295
-0.9901639344262295 x 100 = -99.02%