-27.38% is the change from 873 to 634
Calculation steps:
[( 634 - 873 ) ÷ 873] x 100 = -27.38%
Formula
Percentage change = [(634 - 873) / 873] x 100
Subtract the new number by the original number
634 - 873 = -239
-239 ÷ 873 = -0.27376861397479957
-0.27376861397479957 x 100 = -27.38%