One size of cardboard can be purchased in sheets that are 3/16 inch thick. The sheets of cardboard are stacked on top of each other in packages. The height of each stack is 2 1/4 inches. How many number of sheets are in a stack
2 1/4 = 9/4 9/4 divided by 3/16 Flip the second fraction 9/4 x 16/3 Multiply numerators by numerators and denominators by denominators. 9x16 and 4x3 144/12 Simplify 144/12= 12 12 sheets of cardboard in a stack.
