-45.32% is the change from 909 to 497
Calculation steps:
[( 497 - 909 ) ÷ 909] x 100 = -45.32%
Formula
Percentage change = [(497 - 909) / 909] x 100
Subtract the new number by the original number
497 - 909 = -412
-412 ÷ 909 = -0.45324532453245325
-0.45324532453245325 x 100 = -45.32%