The profit/volume (P/V) ratio expresses the relationship between contribution and sales. It is calculated as contribution divided by sales or sales minus variable costs divided by sales. The P/V ratio is important for analyzing the profitability of a business, as a higher ratio means more profit and a lower ratio means less profit. The ratio can be increased by raising prices, lowering variable costs, or selling more profitable products. The P/V ratio is also useful for calculating the break-even point, profit at a given sales volume, sales needed for a target profit, and sales required to maintain profits with a price reduction.