-28.43% is the change from 897 to 642
Calculation steps:
[( 642 - 897 ) ÷ 897] x 100 = -28.43%
Formula
Percentage change = [(642 - 897) / 897] x 100
Subtract the new number by the original number
642 - 897 = -255
-255 ÷ 897 = -0.2842809364548495
-0.2842809364548495 x 100 = -28.43%