Solving Percent Word Problems with Equivalent Ratios

The video tutorial covers solving percent problems using equivalent ratios. It begins with an introduction and review of percent concepts, explaining that percent means 'out of 100' and is a special ratio. The tutorial then provides five examples, each demonstrating how to solve a percent problem using the cross-multiplication method. The examples include scenarios like Sam's math test, Andrew's homework, Bryson's lawn mowing, Alandria's test results, and Henry's book reading. The video concludes with a summary and shoutouts to contributors.

What does the term 'percent' mean?

• Out of 50

• Out of 10

• Out of 1000

• Out of 100

What is the second quantity in a percent ratio?

• 50

• 10

• 100

• 1000

If Sam has answered 20 questions and is 10% complete, how many questions are on the test?

• 200

• 150

• 100

• 250

Tags

CCSS.6.RP.A.3C

Andrew has answered 5 questions and is 20% finished. How many questions are on his homework?

• 25

• 30

• 35

• 20

Tags

CCSS.6.RP.A.3C

Bryson has mowed 15 out of 25 lawns. How many lawns does he have left to mow?

• 20

• 5

• 15

• 10

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What percent of lawns does Bryson have left to mow?

• 50%

• 20%

• 30%

• 40%

Alandria earned 85% on her math test with 30 questions. How many questions did she get correct?

• 22.5

• 25.5

• 27

• 20

Tags

CCSS.6.RP.A.3C

Henry has read 120 pages of his 150-page book. How many pages does he have left to read?

• 20

• 35

• 30

• 25

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What percent of his book does Henry have left to read?

• 20%

• 25%

• 10%

• 15%

What is the method called that is used to solve for the unknown in these problems?

• Cross multiplication

• Division

• Addition

• Subtraction

Tags

CCSS.4.NBT.B.6