-44.91% is the change from 815 to 449
Calculation steps:
[( 449 - 815 ) ÷ 815] x 100 = -44.91%
Formula
Percentage change = [(449 - 815) / 815] x 100
Subtract the new number by the original number
449 - 815 = -366
-366 ÷ 815 = -0.449079754601227
-0.449079754601227 x 100 = -44.91%