-28.59% is the change from 906 to 647
Calculation steps:
[( 647 - 906 ) ÷ 906] x 100 = -28.59%
Formula
Percentage change = [(647 - 906) / 906] x 100
Subtract the new number by the original number
647 - 906 = -259
-259 ÷ 906 = -0.2858719646799117
-0.2858719646799117 x 100 = -28.59%