-86.59% is the change from 999 to 134
Calculation steps:
[( 134 - 999 ) ÷ 999] x 100 = -86.59%
Formula
Percentage change = [(134 - 999) / 999] x 100
Subtract the new number by the original number
134 - 999 = -865
-865 ÷ 999 = -0.8658658658658659
-0.8658658658658659 x 100 = -86.59%