-48.39% is the change from 870 to 449
Calculation steps:
[( 449 - 870 ) ÷ 870] x 100 = -48.39%
Formula
Percentage change = [(449 - 870) / 870] x 100
Subtract the new number by the original number
449 - 870 = -421
-421 ÷ 870 = -0.4839080459770115
-0.4839080459770115 x 100 = -48.39%