-5.5% is the change from 909 to 859
Calculation steps:
[( 859 - 909 ) ÷ 909] x 100 = -5.5%
Formula
Percentage change = [(859 - 909) / 909] x 100
Subtract the new number by the original number
859 - 909 = -50
-50 ÷ 909 = -0.05500550055005501
-0.05500550055005501 x 100 = -5.5%