Luis is making chocolate chip cookies. The recipe calls for 1/8 cup of almonds for every 3/4 cup of chocolate chips. if luis uses 3 cups of chocolate chips, how many cups of almonds will he need?

The ratio of almonds to chocolate chips is 1/8 cup: 3/4 cup, or 1:6.

If Luis uses 3 cups of chocolate chips, he will need 3/6 = <<3/6=0.5>>0.5 cups of almonds. Answer: \boxed{0.5}.