258.06% is the change from 279 to 999
Calculation steps:
[( 999 - 279 ) ÷ 279] x 100 = 258.06%
Formula
Percentage change = [(999 - 279) / 279] x 100
Subtract the new number by the original number
999 - 279 = 720
720 ÷ 279 = 2.5806451612903225
2.5806451612903225 x 100 = 258.06%