Henry and Bobby are custodians who plan to repaint some classroom bookshelves. Henry has 7 ¼ gallons of green paint and Bobby has 3 2/4 gallons less green paint than Henry. All of the bookshelves are the same size and each require 1/6 gallon of paint. How many bookcases will the custodians be able to repaint with that amount of paint?
first how much do they have?
7 1/4 + 7 1/4 - 3 2/4
= 11 gallons
now
11 gallons * 6 shelves / gallon = 66