251.76% is the change from 284 to 999
Calculation steps:
[( 999 - 284 ) ÷ 284] x 100 = 251.76%
Formula
Percentage change = [(999 - 284) / 284] x 100
Subtract the new number by the original number
999 - 284 = 715
715 ÷ 284 = 2.517605633802817
2.517605633802817 x 100 = 251.76%