-25.73% is the change from 859 to 638
Calculation steps:
[( 638 - 859 ) ÷ 859] x 100 = -25.73%
Formula
Percentage change = [(638 - 859) / 859] x 100
Subtract the new number by the original number
638 - 859 = -221
-221 ÷ 859 = -0.2572759022118743
-0.2572759022118743 x 100 = -25.73%