104.29% is the change from 489 to 999
Calculation steps:
[( 999 - 489 ) ÷ 489] x 100 = 104.29%
Formula
Percentage change = [(999 - 489) / 489] x 100
Subtract the new number by the original number
999 - 489 = 510
510 ÷ 489 = 1.0429447852760736
1.0429447852760736 x 100 = 104.29%