-13.61% is the change from 999 to 863
Calculation steps:
[( 863 - 999 ) ÷ 999] x 100 = -13.61%
Formula
Percentage change = [(863 - 999) / 999] x 100
Subtract the new number by the original number
863 - 999 = -136
-136 ÷ 999 = -0.13613613613613615
-0.13613613613613615 x 100 = -13.61%