Four different stores are having a sale. The signs below show the discounts available at each of the four stores.

Two for the price of one

Buy two and get 50% off the
second one

Buy one and get 25% off the
second

Three for the price of two

a. Which of these four different offers gives the
biggest price reduction?
Explain your reasoning
clearly

b. Which of these four different offers gives the
smallest price reduction? Explain your reasoning
clearly.