-4.18% is the change from 909 to 871
Calculation steps:
[( 871 - 909 ) ÷ 909] x 100 = -4.18%
Formula
Percentage change = [(871 - 909) / 909] x 100
Subtract the new number by the original number
871 - 909 = -38
-38 ÷ 909 = -0.041804180418041806
-0.041804180418041806 x 100 = -4.18%