Cody and Aria are painting a mural. They decide they want part of the mural to have a purple background. Aria uses 7 tbsp. of blue to 2 tbsp. of red to make her purple paint. Cody is planning to use more and uses 21 tbsp. of blue to 6 tbsp. of red. Are their ratios of purple mixture equivalent to one another's?
To find the ratio of blue to red in Aria's purple mixture, divide the amount of blue by the amount of red: 7 tbsp. / 2 tbsp. = 3.5.
To find the ratio of blue to red in Cody's purple mixture, divide the amount of blue by the amount of red: 21 tbsp. / 6 tbsp. = 3.5.
Both ratios are equal to 3.5, so their ratios of purple mixture are equivalent.