To find the percentage of medium-sized jerseys, you can use the following formula:
\[ \text{Percentage} = \left( \frac{\text{Number of medium-sized jerseys}}{\text{Total number of jerseys}} \right) \times 100 \]
In this case:
- Number of medium-sized jerseys = 14
- Total number of jerseys = 20
Now, plug in the values:
\[ \text{Percentage} = \left( \frac{14}{20} \right) \times 100 \]
\[ \text{Percentage} = 0.7 \times 100 = 70 \]
Thus, 70% of the jerseys are medium-sized jerseys.