-98.02% is the change from 909 to 18
Calculation steps:
[( 18 - 909 ) ÷ 909] x 100 = -98.02%
Formula
Percentage change = [(18 - 909) / 909] x 100
Subtract the new number by the original number
18 - 909 = -891
-891 ÷ 909 = -0.9801980198019802
-0.9801980198019802 x 100 = -98.02%