Answer: He would need 10/3 of ribbon which can be simplified to 3 and 1/3
Step-by-step explanation: multiply the amount you need for each decoration by the amount of decorations needed
2/3 × 5/1 = 10/3
we then divide 10 by 3
3 can go into ten 3 times leaving 1/3 left so we would have 3 and 1/3 as our mixed number