A "ratio" is a fraction defined using two value fields, such as "Sales revenue / Quantity = Price". You can use ratios in planning to calculate prices and other values that involve division.

In this process, you learn about the Customizing settings that you can make for ratios. Then you see a planning layout that already contains the ratios. Actual data is used as the reference for your plan version. After changing the prices in the reference data, you valuate your planned quantities in the current plan version with those prices from the reference version. Thus you will be able to plan prices and quantities separately.