-52.07% is the change from 870 to 417
Calculation steps:
[( 417 - 870 ) ÷ 870] x 100 = -52.07%
Formula
Percentage change = [(417 - 870) / 870] x 100
Subtract the new number by the original number
417 - 870 = -453
-453 ÷ 870 = -0.5206896551724138
-0.5206896551724138 x 100 = -52.07%