102.45% is the change from 489 to 990
Calculation steps:
[( 990 - 489 ) ÷ 489] x 100 = 102.45%
Formula
Percentage change = [(990 - 489) / 489] x 100
Subtract the new number by the original number
990 - 489 = 501
501 ÷ 489 = 1.0245398773006136
1.0245398773006136 x 100 = 102.45%