-74.07% is the change from 999 to 259
Calculation steps:
[( 259 - 999 ) ÷ 999] x 100 = -74.07%
Formula
Percentage change = [(259 - 999) / 999] x 100
Subtract the new number by the original number
259 - 999 = -740
-740 ÷ 999 = -0.7407407407407407
-0.7407407407407407 x 100 = -74.07%