301.2% is the change from 249 to 999
Calculation steps:
[( 999 - 249 ) ÷ 249] x 100 = 301.2%
Formula
Percentage change = [(999 - 249) / 249] x 100
Subtract the new number by the original number
999 - 249 = 750
750 ÷ 249 = 3.0120481927710845
3.0120481927710845 x 100 = 301.2%