-28.71% is the change from 909 to 648
Calculation steps:
[( 648 - 909 ) ÷ 909] x 100 = -28.71%
Formula
Percentage change = [(648 - 909) / 909] x 100
Subtract the new number by the original number
648 - 909 = -261
-261 ÷ 909 = -0.2871287128712871
-0.2871287128712871 x 100 = -28.71%