-5.15% is the change from 873 to 828
Calculation steps:
[( 828 - 873 ) ÷ 873] x 100 = -5.15%
Formula
Percentage change = [(828 - 873) / 873] x 100
Subtract the new number by the original number
828 - 873 = -45
-45 ÷ 873 = -0.05154639175257732
-0.05154639175257732 x 100 = -5.15%