Scientists investigated multidrug resistant bacterial infections in children, which were caused by one type of bacteria, during 2007 and 2015. The proportion of multidrug resistant infections increased from $0.2\%$ to $1.5\%$. What was the percentage increase in multidrug resistant infections between 2007 and 2015?
- A$1.3\%$
- B$87\%$
- C$130\%$
- D$650\%$