Learn to take the percent of a number using a proportion

The video tutorial explains how to solve percentage problems without using calculators. It introduces the concept of proportions and their relation to percentages, emphasizing the importance of understanding the part-over-whole relationship. The tutorial demonstrates setting up and solving a percentage problem using cross multiplication and explores alternative methods for calculation. The focus is on ensuring students can verify their solutions and understand the underlying concepts.

What is the main challenge presented in the problem discussed in the video?

• Finding the percentage of a number without a calculator

• Understanding the concept of whole numbers

• Memorizing multiplication tables

• Learning to use a calculator effectively

How is a percent defined in terms of ratios?

• A part over a whole, with the whole being 100

• A whole over a part, with the part being 100

• A part over a whole, with the whole being 10

• A whole over a part, with the part being 10

What is the first step in setting up the proportion to solve the problem?

• Multiplying the whole by 100

• Subtracting the part from the whole

• Identifying the part and the whole

• Dividing the part by 100

What is the result of the cross multiplication in the proportion method?

• 60% equals 13X

• 780% equals 100X

• 13% equals 60X

• 100% equals 780X

How do you convert the result of 780% to a decimal?

• Subtract 100

• Divide by 100

• Multiply by 100

• Add 100

What is the alternative method to solve the problem without using proportions?

• Multiplying the whole number by the decimal equivalent of the percent

• Subtracting the percent from the whole number

• Adding the whole number to the percent

• Dividing the whole number by the percent

What is the decimal equivalent of 13% used in the alternative method?

• 0.013

• 13

• 0.13

• 1.3