\begin{tabular}{|l|l} 21. \( \begin{array}{l}\text { The ratio of lemons to oranges is } 3: 8 \text {. If } \\ \text { there are } 24 \text { oranges, how many lemons } \\ \text { are there? }\end{array} \)\end{tabular}

To solve the problem, you can set up a ratio based on the information given. The ratio of lemons to oranges is 3:8, which can be written as \(\frac{\text{lemons}}{\text{oranges}} = \frac{3}{8}\). Given there are 24 oranges, you can use cross multiplication to find the number of lemons. Let \(L\) represent the number of lemons. Setting up the equation: \(\frac{L}{24} = \frac{3}{8}\) Cross-multiplying gives you: \(8L = 3 \times 24\) Calculating \(3 \times 24\) gives you 72, so: \(8L = 72\) Now, divide both sides by 8: \(L = \frac{72}{8} = 9\) Thus, there are 9 lemons.