99.4% is the change from 499 to 995
Calculation steps:
[( 995 - 499 ) ÷ 499] x 100 = 99.4%
Formula
Percentage change = [(995 - 499) / 499] x 100
Subtract the new number by the original number
995 - 499 = 496
496 ÷ 499 = 0.9939879759519038
0.9939879759519038 x 100 = 99.4%