99.8% is the change from 491 to 981
Calculation steps:
[( 981 - 491 ) ÷ 491] x 100 = 99.8%
Formula
Percentage change = [(981 - 491) / 491] x 100
Subtract the new number by the original number
981 - 491 = 490
490 ÷ 491 = 0.9979633401221996
0.9979633401221996 x 100 = 99.8%