In cooking, measuring ingredients can be tricky, especially when dealing with fractions. To convert a recipe that calls for 3/4 cup into metric units, you can start by understanding how many milliliters are equivalent to 1 cup. Generally, 1 cup is equal to approximately 236.6 milliliters. Therefore, if a recipe requires 3/4 cup of an ingredient, you can multiply the amount in cups by 236.6 ml/cup to get the metric measurement. So, for 3/4 cup, that would be 174.9 milliliters. When working with fractions, it's also helpful to convert the fraction into a decimal or percentage if possible. In this case, 3/4 can also be expressed as 0.75 or 75%. Knowing how to convert between different measurement units and understanding the relationships between them will help make your cooking tasks more efficient and accurate.