PROPORTIONS

Problem:

4. Mr. Montes uses 18 yards of cloth for making 5 pants. How many pants will he make for 72 yards of cloth?

Choices:

a. Mr. Montes will make 20 pants.

b. Mr. Montes will make 5 pants.

c. Mr. Montes will make 15 pants.

d. Mr. Montes will make 10 pants.

Answer:

a. Mr. Montes will make 20 pants.

Solution/Explanation:

Write a proportion to represent the problem.

• 18:5 = 72:x
• where: x is the unknown number (number of pants that Mr. Montes will make for 72 yards of cloth)

Now, solve for x.

• 18:5 = 72:x
• 18x = (5)(72)
• 18x = 360
• x = 360/18
• x = 20
• Mr. Montes will make 20 pants for 72 yards of cloth.

Answer:

a. Mister Montes will make 20 pants

Step-by-step explanation: