199.5% is the change from 200 to 599
Calculation steps:
[( 599 - 200 ) ÷ 200] x 100 = 199.5%
Formula
Percentage change = [(599 - 200) / 200] x 100
Subtract the new number by the original number
599 - 200 = 399
399 ÷ 200 = 1.995
1.995 x 100 = 199.5%
Example