GMAT Quantitative Reasoning Practice Test 4

Last year Melissa invested $\mathrm{\$}\mathit{P}$ in Stock X, which then increased in value by 6% for the year. However, the increase in value of investments in Stock X for the upcoming year is projected to be r%, where . Melissa wishes to invest a total of $\mathrm{\$}\mathit{Q}$ in Stock X the upcoming year so that the projected increase in value of her investment of $\mathrm{\$}\mathit{Q}$ for the upcoming year will be equal to the increase in value of her investment of $\mathrm{\$}\mathit{P}$ for last year. The value of Q is what percent increase in the value of $\mathit{P}$ ?
(1) Last year, the investment of $\mathrm{\$}\mathit{P}$ in Stock $\mathit{X}$ increased in value by $\mathrm{\$}150$
(2) $\mathit{r}=5$