101.01% is the change from 199 to 400
Calculation steps:
[( 400 - 199 ) ÷ 199] x 100 = 101.01%
Formula
Percentage change = [(400 - 199) / 199] x 100
Subtract the new number by the original number
400 - 199 = 201
201 ÷ 199 = 1.0100502512562815
1.0100502512562815 x 100 = 101.01%