When nancy started middle school she was 60 inches tall. when she started high school ,she was 66 inches tall. what was the percent change in her height?

Need so much on this one how many yards?

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Ineed to find the answer to number 2