In economics and engineering, the price–performance ratio refers to a product's ability to deliver performance, of any sort, for its price. Generally speaking, products with a lower price/performance ratio are more desirable, excluding other factors. Price–performance is often written as cost–performance or cost–benefit. Even though this term would seem to be a straightforward ratio, when price performance is improved, better, or increased, it actually refers to the performance divided by the price, in other words exactly the opposite ratio to rank a product as having an increased price/performance.

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