What kind of offer could exemplify a fixed ratio promotion?

A fixed ratio promotion often involves a structured incentive that is contingent upon a customer making a specific number of purchases before receiving a reward. In this case, the promotion "Buy two meals, get one free" clearly illustrates this concept. It establishes a fixed ratio of purchases — customers need to buy two meals to qualify for a complimentary meal. This type of promotion effectively encourages increased spending and repeat purchases, as consumers are motivated to meet the specific threshold to benefit from the offer.

Other options do not conform to the fixed ratio structure. For example, offering free soup on randomly chosen days introduces an element of uncertainty rather than a fixed requirement to receive a reward. Occasional discounts on select menu items also lack the set requirement that characterizes a fixed ratio offer, as discounts may vary and not require a specific number of purchases. Similarly, regular discounts every week do not tie the reward directly to a certain behavior or purchase quantity, making them inconsistent with the fixed ratio concept.