-98.35% is the change from 909 to 15
Calculation steps:
[( 15 - 909 ) ÷ 909] x 100 = -98.35%
Formula
Percentage change = [(15 - 909) / 909] x 100
Subtract the new number by the original number
15 - 909 = -894
-894 ÷ 909 = -0.9834983498349835
-0.9834983498349835 x 100 = -98.35%