question: Paul needs 63 cupcakes for a birthday party happening on Saturday. He already has 8 chocolate cupcakes and 40 toffee cupcakes. How many more cupcakes should Paul buy?
answer: The total number of chocolate and toffee cupcakes is 8 + 40 = <<8+40=48>>48.
  Paul should buy 63 − 48 = <<63-48=15>>15 more cupcakes.
  #### 15