98.81% is the change from 503 to 1000
Calculation steps:
[( 1000 - 503 ) ÷ 503] x 100 = 98.81%
Formula
Percentage change = [(1000 - 503) / 503] x 100
Subtract the new number by the original number
1000 - 503 = 497
497 ÷ 503 = 0.9880715705765407
0.9880715705765407 x 100 = 98.81%