-28.48% is the change from 899 to 643
Calculation steps:
[( 643 - 899 ) ÷ 899] x 100 = -28.48%
Formula
Percentage change = [(643 - 899) / 899] x 100
Subtract the new number by the original number
643 - 899 = -256
-256 ÷ 899 = -0.28476084538375973
-0.28476084538375973 x 100 = -28.48%