This app helps you calculate proportions using the rule of three. It's easy to use and includes a helpful explanation of the rule. Features: Calculate proportions using the rule of three Learn how to calculate the rule of three Simple and easy-to-use interface Benefits: Save time and effort by using the app to calculate proportions for you Learn how to calculate the rule of three so you can use it without the app Use the app in a variety of situations, such as cooking, baking, and photography