Percent Decrease: Fraction to Percent

The video tutorial explains how to solve percent decrease problems by converting fractions to percentages. It introduces the concept and provides two examples: a decrease in class size and a decrease in house value. The process involves creating a fraction from the difference between the original and new amounts, then converting it to a percentage by adjusting the denominator to 100. The tutorial concludes with a summary of the steps involved in solving percent decrease problems.

What is the first step in calculating percent decrease?

• Divide the new amount by the original amount

• Add the original amount to the new amount

• Subtract the new amount from the original amount

• Multiply the original amount by the new amount

In the classroom example, what is the fraction before converting it to a percent?

• 50/35

• 15/50

• 35/50

• 15/100

How do you convert the fraction 15/50 to a percent?

• Add 50 to the numerator

• Multiply both numerator and denominator by 2

• Divide both numerator and denominator by 2

• Multiply the numerator by 2 and the denominator by 100

In the house value example, what is the simplified fraction before converting it to a percent?

• 1/10

• 10/100

• 10,000/100,000

• 100/10

What is the percent decrease in the house value example?

• 20%

• 15%

• 10%

• 5%