To determine how many cups of almonds Luis will need for 3 cups of chocolate chips, we start with the ratio given in the recipe. The recipe indicates that for every 3/4 cup of chocolate chips, 1/8 cup of almonds is required.
First, we find out how many times 3/4 cups go into 3 cups of chocolate chips:
This means that 3 cups of chocolate chips is equivalent to 4 portions of 3/4 cups.
Next, since each portion requires 1/8 cup of almonds, we multiply the number of portions (4) by the amount of almonds needed for each portion (1/8 cup):
Therefore, Luis will need 1/2 cup of almonds for 3 cups of chocolate chips.