-99% is the change from 903 to 9
Calculation steps:
[( 9 - 903 ) ÷ 903] x 100 = -99%
Formula
Percentage change = [(9 - 903) / 903] x 100
Subtract the new number by the original number
9 - 903 = -894
-894 ÷ 903 = -0.9900332225913622
-0.9900332225913622 x 100 = -99%