Respuesta :

The price elasticity of demand measures the percentage change in quantity demanded that results from a percentage change in price.

By using this formula you are able to see the response and change in demand, good or bad, when nothing besides the price changes. By measuring this companies can see how many items will sell based on price and if they can lower or raise it depending on demand. 

The price elasticity of demand refers to the percentile change in quantity requested as a consequence of a price change.

The price elasticity is a metric that measures how sensitive a product's quantity sought is to price changes. When all other factors of demand are maintained constant, it is the proportion change in quantity sought in proportion to a single change in its price.

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