Question

Olivia ties 2.5 ft of ribbon onto a balloon how many yards of ribbons does Olivia need for 18 balloons?

Answer 1

You just multiply 2.5 by 18 and you get 45

Answer 2

Let's break it down, this is easy.
If she needs 2.5 feet of ribbon for every balloon and there are 18 balloons, that would be 2.5 X 18
half of 18 is 9
18+18=36
36+9=45 
She would need 45 feet of ribbon, to convert that to yards just divide by 3
45/3=15
she needs 15 yards of ribbon for all 18 balloons