-28.68% is the change from 896 to 639
Calculation steps:
[( 639 - 896 ) ÷ 896] x 100 = -28.68%
Formula
Percentage change = [(639 - 896) / 896] x 100
Subtract the new number by the original number
639 - 896 = -257
-257 ÷ 896 = -0.28683035714285715
-0.28683035714285715 x 100 = -28.68%