Understanding Percent Proportions

What is a percent proportion?

• A way to measure angles

• A method to calculate discounts

• A ratio that compares a part to a whole

• A comparison of two different units

In Jorge's example, what is the whole amount?

• $60

• $24

• $100

• $40

What is the percentage of Jorge's spending on his mom's gift?

• 60%

• 40%

• 24%

• 100%

Which method always works for solving percent proportions?

• Trial and error

• Guessing

• Cross-multiplication

• Using a calculator

How many gallons of skim milk did HEB sell?

• 45 gallons

• 100 gallons

• 171 gallons

• 380 gallons

What percentage of the milk sold was skim milk?

• 60%

• 100%

• 45%

• 24%

In the orchestra example, what is the part?

• 12 students

• 24 students

• 100 students

• 50 students

What is the total number of students in the orchestra?

• 100 students

• 24 students

• 12 students

• 50 students

What is the first step in setting up a percent proportion?

• Identify the part

• Identify the whole

• Calculate the scale factor

• Look for the percent sign

What is the quotient when dividing 1200 by 24 in the orchestra example?

• 100

• 50

• 24

• 12