Luis is making chocolate chip cookies. The recipe calls for 1/8 a 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? Round to the nearest tenth.
First find the number of 3/4 cup chocolate chip groups Luis will make: 3 cups / 3/4 cup/group = <<3/(3/4)=4>>4 groups
Then multiply the number of chocolate chip groups by the amount of almonds per chocolate chip group: 4 groups * 1/8 cup almonds/group = <<4*1/8=0.5>>0.5 cups of almonds. Answer: \boxed{0.5}.