-73.84% is the change from 990 to 259
Calculation steps:
[( 259 - 990 ) ÷ 990] x 100 = -73.84%
Formula
Percentage change = [(259 - 990) / 990] x 100
Subtract the new number by the original number
259 - 990 = -731
-731 ÷ 990 = -0.7383838383838384
-0.7383838383838384 x 100 = -73.84%