48 is what percent of 64?

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?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Find the area of the triangle shown 3 by 6