-27.9% is the change from 871 to 628
Calculation steps:
[( 628 - 871 ) ÷ 871] x 100 = -27.9%
Formula
Percentage change = [(628 - 871) / 871] x 100
Subtract the new number by the original number
628 - 871 = -243
-243 ÷ 871 = -0.27898966704936856
-0.27898966704936856 x 100 = -27.9%