99.59% is the change from 491 to 980
Calculation steps:
[( 980 - 491 ) ÷ 491] x 100 = 99.59%
Formula
Percentage change = [(980 - 491) / 491] x 100
Subtract the new number by the original number
980 - 491 = 489
489 ÷ 491 = 0.9959266802443992
0.9959266802443992 x 100 = 99.59%