-26.95% is the change from 909 to 664
Calculation steps:
[( 664 - 909 ) ÷ 909] x 100 = -26.95%
Formula
Percentage change = [(664 - 909) / 909] x 100
Subtract the new number by the original number
664 - 909 = -245
-245 ÷ 909 = -0.26952695269526955
-0.26952695269526955 x 100 = -26.95%