-18.72% is the change from 999 to 812
Calculation steps:
[( 812 - 999 ) ÷ 999] x 100 = -18.72%
Formula
Percentage change = [(812 - 999) / 999] x 100
Subtract the new number by the original number
812 - 999 = -187
-187 ÷ 999 = -0.1871871871871872
-0.1871871871871872 x 100 = -18.72%