-27.7% is the change from 888 to 642
Calculation steps:
[( 642 - 888 ) ÷ 888] x 100 = -27.7%
Formula
Percentage change = [(642 - 888) / 888] x 100
Subtract the new number by the original number
642 - 888 = -246
-246 ÷ 888 = -0.27702702702702703
-0.27702702702702703 x 100 = -27.7%