Step-by-step explanation: 2/3 times 9 is 6 parts of lasagna, so that means that the family must have eaten less than 6 piece of ziti; and 1/4 times 8 equals 2 parts of ziti.
You just multiply top times top and bottom times bottom and then find a number you can divide into the number and you keep doing that until you can't simplify any more.