Marco is making blueberry muffins. The ratio between flour and blueberries for the recipe being used is shown in the table below.

Cups of flour= 3/4, 1 1/2, 2 1/4, 2 5/8
Cudps of blueberries= 1/4, 1/2, 3/4, 7/8

How many cups of blueberries will Marco need if he has 2 cups of flour to use?

To find the ratio of flour to blueberries, we need to compare the cups of flour with the corresponding cups of blueberries.

The given ratios are:

3/4 cups of flour = 1/4 cups of blueberries
1 1/2 cups of flour = 1/2 cups of blueberries
2 1/4 cups of flour = 3/4 cups of blueberries
2 5/8 cups of flour = 7/8 cups of blueberries

Since we know that Marco has 2 cups of flour to use, we need to find the corresponding cups of blueberries for 2 cups of flour.

From the ratio table, we see that 2 1/4 cups of flour correspond to 3/4 cups of blueberries.

Therefore, if Marco has 2 cups of flour, he will need 2/2.25 * 0.75 = 2/3 * 0.75 = 1.5/3 = 0.5 cups of blueberries.

So, Marco will need 0.5 cups of blueberries.