Alita is knitting a scarf. she will make 1/8 of it using white yarn, 2/8 using green yarn, 3/8 using red yarn, and the rest of the scarf will be made with blue yarn. what fraction of the scarf will be blue? show your work.

Take off the denominator. Now you just have 3, 2, and 1. If you add those up you get 6. When you add 2 to 6 you get eight. In this you want to get to the number of the denominator, so your answer is 2.

What other users are trying to explain is; imagine you have 8 pieces of yarn, first you use 1 piece of it then you use 2 and then finally 3 afterwards you are left with 2 pieces of yarn and that will be the part that is blue in a fraction it would be 2/8.