Exploring Percent Proportions

The video tutorial explains how to calculate percentages, find parts or wholes using proportions, and solve problems involving percentages. It includes three examples: calculating 75% of 120, determining what percent 60 is of 75, and finding the whole when 40% is 25. The tutorial emphasizes using cross-multiplication and understanding keywords like 'of' and 'is' to set up equations.

What is the proportion used to find a percentage of a number?

• None of the above

• Part over whole equals percentage over 100

• Whole over part equals 100 over percentage

• Percentage over 100 equals whole over part

If 75% of a class of 120 students are passing, how many students does that represent?

• 90 students

• 60 students

• 75 students

• 30 students

How do you solve for an unknown part when given the percentage and the whole?

• None of the above

• Subtract the percentage from the whole

• Multiply the whole by the percentage

• Divide the product of the whole and percentage by 100

What is the result of 75% of 120?

• 90

• 85

• 100

• 95

What percentage of 75 is 60?

• 80%

• 85%

• 90%

• 75%

How do you find an unknown percentage when the part and whole are known?

• None of the above

• Divide the part by the whole and multiply by 100

• Divide the whole by the part

• Multiply the part by the whole

What is 40% of a number if the part is 25?

• 65

• 62.5

• 70

• 60

How do you determine the whole number when a percentage and its part are given?

• Subtract the percentage from the part

• Divide the part by the percentage and multiply by 100

• None of the above

• Multiply the part by the percentage

What is the correct method to solve for the whole when the part and percentage are known?

• Multiply the part by 100 and divide by the percentage

• Divide the part by the percentage and multiply by 100

• Add the part to the percentage

• None of the above

If 40% of a number is 25, what is the whole number?

• 62.5

• 60

• 55

• 50