-50.72% is the change from 909 to 448
Calculation steps:
[( 448 - 909 ) ÷ 909] x 100 = -50.72%
Formula
Percentage change = [(448 - 909) / 909] x 100
Subtract the new number by the original number
448 - 909 = -461
-461 ÷ 909 = -0.5071507150715071
-0.5071507150715071 x 100 = -50.72%