-40.81% is the change from 909 to 538
Calculation steps:
[( 538 - 909 ) ÷ 909] x 100 = -40.81%
Formula
Percentage change = [(538 - 909) / 909] x 100
Subtract the new number by the original number
538 - 909 = -371
-371 ÷ 909 = -0.4081408140814081
-0.4081408140814081 x 100 = -40.81%