98.8% is the change from 502 to 998
Calculation steps:
[( 998 - 502 ) ÷ 502] x 100 = 98.8%
Formula
Percentage change = [(998 - 502) / 502] x 100
Subtract the new number by the original number
998 - 502 = 496
496 ÷ 502 = 0.9880478087649402
0.9880478087649402 x 100 = 98.8%