-27.88% is the change from 886 to 639
Calculation steps:
[( 639 - 886 ) ÷ 886] x 100 = -27.88%
Formula
Percentage change = [(639 - 886) / 886] x 100
Subtract the new number by the original number
639 - 886 = -247
-247 ÷ 886 = -0.27878103837471785
-0.27878103837471785 x 100 = -27.88%