0.1% is the change from 997 to 998
Calculation steps:
[( 998 - 997 ) ÷ 997] x 100 = 0.1%
Formula
Percentage change = [(998 - 997) / 997] x 100
Subtract the new number by the original number
998 - 997 = 1
1 ÷ 997 = 0.0010030090270812437
0.0010030090270812437 x 100 = 0.1%