-18.52% is the change from 999 to 814
Calculation steps:
[( 814 - 999 ) ÷ 999] x 100 = -18.52%
Formula
Percentage change = [(814 - 999) / 999] x 100
Subtract the new number by the original number
814 - 999 = -185
-185 ÷ 999 = -0.18518518518518517
-0.18518518518518517 x 100 = -18.52%