To find the ratio of blue to red in the purple paint mixture, we can compare the amounts of blue and red used.
You have:
- 28 oz of blue
- 24 oz of red
The ratio of blue to red can be expressed as:
\[ \text{Ratio} = \frac{\text{amount of blue}}{\text{amount of red}} = \frac{28}{24} \]
To simplify this ratio, we can divide both the numerator and the denominator by their greatest common divisor, which is 4:
\[ \frac{28 \div 4}{24 \div 4} = \frac{7}{6} \]
So, the simplified ratio of blue to red for the purple paint is \(7:6\).