Exploring Percent Proportions in PA 4.9

What does one ratio in a percent proportion compare?

• A part of a quantity to another part

• Two different quantities

• Two different percentages

• A part of a quantity to the whole quantity

Which formula can be used to represent a percent proportion?

• Whole over part equals percent over 100

• Part over whole equals percent over 100

• Percent over whole equals part over 100

• Whole over percent equals part over 100

In the example '18 is what percent of 40?', what is the part?

• 18

• 40

• The percent

• The whole

How do you solve the proportion 18/40 = x/100?

• Multiply 18 by 100, then divide by 40

• Subtract 18 from 40, then multiply by 100

• Multiply 40 by 100, then divide by 18

• Add 18 and 40, then divide by 100

In the example '28 is 4% of what number?', what is the whole?

• The number we are solving for

• The percent

• 28

• 4

How do you solve the proportion 28/x = 4/100?

• Subtract 4 from 28, then multiply by 100

• Multiply 28 by 100, then divide by 4

• Multiply 4 by 100, then divide by 28

• Add 28 and 4, then divide by 100

In the book collector problem, what is the whole?

• 56

• 425

• The percent

• The number of books published before 1990

How do you solve the proportion x/425 = 56/100?

• Multiply 56 by 425, then divide by 100

• Multiply 425 by 100, then divide by 56

• Add 425 and 56, then divide by 100

• Subtract 56 from 425, then multiply by 100

In the paycheck problem, what is the part?

• The total paycheck

• 8%

• The whole

• 34.12

How do you solve the proportion 34.12/x = 8/100?

• Multiply 34.12 by 100, then divide by 8

• Subtract 8 from 34.12, then multiply by 100

• Multiply 8 by 100, then divide by 34.12

• Add 34.12 and 8, then divide by 100