-81.51% is the change from 449 to 83
Calculation steps:
[( 83 - 449 ) ÷ 449] x 100 = -81.51%
Formula
Percentage change = [(83 - 449) / 449] x 100
Subtract the new number by the original number
83 - 449 = -366
-366 ÷ 449 = -0.8151447661469933
-0.8151447661469933 x 100 = -81.51%