-26.97% is the change from 875 to 639
Calculation steps:
[( 639 - 875 ) ÷ 875] x 100 = -26.97%
Formula
Percentage change = [(639 - 875) / 875] x 100
Subtract the new number by the original number
639 - 875 = -236
-236 ÷ 875 = -0.26971428571428574
-0.26971428571428574 x 100 = -26.97%