-28.59% is the change from 899 to 642
Calculation steps:
[( 642 - 899 ) ÷ 899] x 100 = -28.59%
Formula
Percentage change = [(642 - 899) / 899] x 100
Subtract the new number by the original number
642 - 899 = -257
-257 ÷ 899 = -0.28587319243604004
-0.28587319243604004 x 100 = -28.59%