This math topic involves practicing the skill of calculating equivalent ratios. Each problem presents a scenario where specific quantities of ingredients (like peach and lime for a smoothie, or mustard and ketchup for a sauce) are used in a defined ratio. The challenge is to determine how much of one ingredient is needed when a different quantity of the other ingredient is given. The ratios are applied to real-world instances, such as recipes and paint mixing, enhancing the practical application and understanding of ratios.