-85.09% is the change from 999 to 149
Calculation steps:
[( 149 - 999 ) ÷ 999] x 100 = -85.09%
Formula
Percentage change = [(149 - 999) / 999] x 100
Subtract the new number by the original number
149 - 999 = -850
-850 ÷ 999 = -0.8508508508508509
-0.8508508508508509 x 100 = -85.09%