Which fraction is equivalent to 5/6 + 7/8

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

Find the value of x for which the lines are parallel.

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?