-85.49% is the change from 999 to 145
Calculation steps:
[( 145 - 999 ) ÷ 999] x 100 = -85.49%
Formula
Percentage change = [(145 - 999) / 999] x 100
Subtract the new number by the original number
145 - 999 = -854
-854 ÷ 999 = -0.8548548548548549
-0.8548548548548549 x 100 = -85.49%