Answer: She went [tex]11[/tex] times during the summer.
Step-by-step explanation:
If Louisa's savings change by [tex]-6[/tex] each time she goes bowling and it went to [tex]-66[/tex], that means that Louisa went another [tex]11[/tex] times.
[tex]\frac{1}{11}[/tex]
So therefore your answer would be 11.