-44.88% is the change from 909 to 501
Calculation steps:
[( 501 - 909 ) ÷ 909] x 100 = -44.88%
Formula
Percentage change = [(501 - 909) / 909] x 100
Subtract the new number by the original number
501 - 909 = -408
-408 ÷ 909 = -0.44884488448844884
-0.44884488448844884 x 100 = -44.88%