Margaret mixes red and blue paint to make purple. She finds the best ratio to get

Margaret mixes red and blue paint to make purple. She finds the best ratio to get the shade of purple she wants is 2 quarts of red paint and 3 quarts of blue paint. Margaret needs a total of 45 quarts of purple paint. She begins a table to help organize the data. Margaret is not sure what to do next to find the number of quarts of red and blue paint she needs.