Understanding Percentages from Fractions

The video tutorial explains how to convert fractions into percentages by making the denominator 100. It uses the example of converting 15/20 to a percentage by setting up a proportion and solving for the unknown. The tutorial emphasizes that multiplying a fraction by 100 is the key step in conversion. It also provides a second example, converting 3/5 to a percentage, reinforcing the method. The video aims to clarify the concept and provide a quick formula for converting any fraction to a percentage.

What is the first step in converting a fraction to a percentage?

• Divide the numerator by 100

• Add 100 to the numerator

• Make the denominator 100

• Multiply the fraction by 10

In the example of 15 by 20, what is the value of x when expressed as x by 100?

• 80

• 75

• 70

• 60

What mathematical concept is used to equate 15 by 20 to x by 100?

• Division

• Proportion

• Subtraction

• Addition

What is the general method to convert any fraction to a percentage?

• Divide the fraction by 100

• Multiply the fraction by 100

• Add 100 to the fraction

• Subtract 100 from the fraction

Why do we multiply a fraction by 100 to convert it to a percentage?

• To increase the fraction's value

• To make the numerator 100

• To make the denominator 100

• To simplify the fraction

What is the percentage equivalent of 3 by 5?

• 60%

• 65%

• 55%

• 50%

In the example of 3 by 5, what is the result of multiplying 3 by 5 by 100?

• 50

• 60

• 70

• 80