-83.5% is the change from 909 to 150
Calculation steps:
[( 150 - 909 ) ÷ 909] x 100 = -83.5%
Formula
Percentage change = [(150 - 909) / 909] x 100
Subtract the new number by the original number
150 - 909 = -759
-759 ÷ 909 = -0.834983498349835
-0.834983498349835 x 100 = -83.5%