How many unique ways are there to arrange the letters in the word pretty?

How do i get the answer for 2/3 * 10/3

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Multiply. write your answer in simplest form. 3/8 x 5/7