Percent Proportion

This lesson teaches how to use the percent proportion to find the part, whole, or percent when given the other values. The percent proportion is expressed as part over whole equals percent over 100. An example problem is solved to find 40% of 30, demonstrating the use of cross-multiplication to solve for the unknown part. An alternative method is also provided, which involves multiplying the numbers in the diagonal without a variable and dividing by the remaining number. The lesson concludes with a recap of the percent proportion concept.

What is the primary purpose of using the percent proportion?

• To find the sum of two numbers

• To determine the relationship between part, whole, and percent

• To calculate the average of a set of numbers

• To solve quadratic equations

In the problem 'What is 40% of 30?', what does the number 30 represent?

• The part

• The percent

• The variable

• The whole

Which equation represents the cross products in the percent proportion problem of finding 40% of 30?

• 100x = 30 + 40

• 100x = 30 - 40

• 100x = 30 * 40

• 100x = 30 / 40

What is the result of dividing 1,200 by 100 in the context of solving the percent proportion problem?

• 12

• 10

• 20

• 15

What is the alternative method to solve a percent proportion problem if solving equations is challenging?

• Multiply the numbers in the diagonal with a variable

• Add all numbers and divide by 2

• Subtract the smaller number from the larger number

• Multiply the numbers in the diagonal without a variable and divide by the leftover number