To calculate the frequency of red flowers in the garden, you can use the formula:
\[ \text{Frequency} = \frac{\text{Number of red flowers}}{\text{Total number of flowers}} \]
In this case:
- Number of red flowers = 30
- Total number of flowers = 40
So the calculation would be:
\[ \text{Frequency} = \frac{30}{40} = 0.75 \]
Thus, the frequency of red flowers is 0.75.