Kati wants to order pizza for herself and Tom. She wants olives and mushrooms, while Tom wants pepperoni. She could order two small pizzas, which cost $7.00 each plus $1.00 per topping, but it is cheaper to order a large pizza with 3 half-toppings, which costs $12.00 plus $1.00 per half-topping. How much does Kati save?

So, the important info… It’s Tom that wants the pepperoni, see?
Kati–olives and mushrooms (2 toppings)
Tom–pepperoni (1 topping)

First, figure out the amount of 2 small pizzas:
Kati–$7 plus ($1 x 2 toppings) = 7 + 2 = $9
Tom–$7 plus ($1 x 1 topping) = 7 + 1 = $8
Total = 9 + 8 = $17 for two small pizzas.

Now, figure out the amount of the large pizza with half-toppings:
Kati gets 2 half-toppings on her half, Tom gets 1 half-topping on his, so it’s 3 half-toppings together:
$12 + (3 half-toppings x $1) = 12 + 3 = $15

Find the difference: $17 – $15 = $2

Sorry, man, it’s 2 bucks.

Curtis

Thanks ,

Zaher