-5.61% is the change from 909 to 858
Calculation steps:
[( 858 - 909 ) ÷ 909] x 100 = -5.61%
Formula
Percentage change = [(858 - 909) / 909] x 100
Subtract the new number by the original number
858 - 909 = -51
-51 ÷ 909 = -0.056105610561056105
-0.056105610561056105 x 100 = -5.61%