-86.29% is the change from 999 to 137
Calculation steps:
[( 137 - 999 ) ÷ 999] x 100 = -86.29%
Formula
Percentage change = [(137 - 999) / 999] x 100
Subtract the new number by the original number
137 - 999 = -862
-862 ÷ 999 = -0.8628628628628628
-0.8628628628628628 x 100 = -86.29%