-27.06% is the change from 909 to 663
Calculation steps:
[( 663 - 909 ) ÷ 909] x 100 = -27.06%
Formula
Percentage change = [(663 - 909) / 909] x 100
Subtract the new number by the original number
663 - 909 = -246
-246 ÷ 909 = -0.2706270627062706
-0.2706270627062706 x 100 = -27.06%