398.5% is the change from 200 to 997
Calculation steps:
[( 997 - 200 ) ÷ 200] x 100 = 398.5%
Formula
Percentage change = [(997 - 200) / 200] x 100
Subtract the new number by the original number
997 - 200 = 797
797 ÷ 200 = 3.985
3.985 x 100 = 398.5%
Example