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I don't get these concepts for fractions example find each missing number 6 2/5 = 5 _?_/5 write each answer in the lowest terms subtract 12 1/3 - 9 2/3 ________

A pizza parlor offers three different kinds of crust, two different kinds of sauce, and twelve different toppings. How many different one-topping pizzas can they make? I came up with 72, 3 times 2 times 12 then multiply 2 . 3 =6 then 6 . 12 =72