Answer
The statement does not make sense.
Work Step by Step
The statement does not make sense.
Let $I$ be the person's income. The rent increased from $0.2I$ to $0.3I$. The increase in rent is $0.1I$. We can express this increase as a percent.
$\frac{increase}{original~rent} = \frac{0.1I}{0.2I} = 0.5 = 50\%$
The percent increase is 50%
