-71.52% is the change from 899 to 256
Calculation steps:
[( 256 - 899 ) ÷ 899] x 100 = -71.52%
Formula
Percentage change = [(256 - 899) / 899] x 100
Subtract the new number by the original number
256 - 899 = -643
-643 ÷ 899 = -0.7152391546162402
-0.7152391546162402 x 100 = -71.52%