-23.6% is the change from 339 to 259
Calculation steps:
[( 259 - 339 ) ÷ 339] x 100 = -23.6%
Formula
Percentage change = [(259 - 339) / 339] x 100
Subtract the new number by the original number
259 - 339 = -80
-80 ÷ 339 = -0.2359882005899705
-0.2359882005899705 x 100 = -23.6%