Josh created a pattteren .20 tiles were blue . For the rest of the patteten he used equal numbers of red and white tiles . 40 percent of the patteren was made with blue tiles . How many red tiles were used to make the patteren ?

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?