If the price of a substitute good decreases, what is most likely to happen to the demand for the original good?

When the price of a substitute good decreases, people are more likely to buy that substitute instead of the original good. This happens because consumers often look for the best deal, and if one product costs less, they may choose it over another similar product. For example, if the price of margarine drops, people might buy more margarine instead of butter. As a result, the demand for butter would likely decrease because fewer people want to buy it when they can get margarine for a lower price. This shows how prices of related products can influence what consumers choose to buy.