Understanding Percentages and Rates

The video tutorial explains the formula for calculating percentages, which involves three components: base, rate, and part. It provides examples of how to calculate the percentage of items sold, solve for the part given the rate and base, and solve for the base given the part and rate. The tutorial also covers converting between decimals and percentages. The video concludes with a promise of more examples in future videos.

What are the three components of a percentage problem?

• Base, Rate, Part

• Whole, Fraction, Decimal

• Sum, Difference, Product

• Numerator, Denominator, Fraction

In the formula 'rate = part / base', what does 'base' represent?

• The percentage

• The total number of parts

• The difference between parts

• The part of the total

What is the formula to solve for the rate?

• rate = part - base

• rate = base x part

• rate = part / base

• rate = base / part

If you have 20 t-shirts and sell 11, what is the percentage sold?

• 55%

• 60%

• 45%

• 50%

How do you convert a decimal to a percentage?

• Divide by 10 and add a percent sign

• Multiply by 10 and add a percent sign

• Divide by 100 and add a percent sign

• Multiply by 100 and add a percent sign

What is the final step in converting a percentage to a decimal?

• Move the decimal point two places to the left

• Divide by 10

• Multiply by 100

• Add a decimal point

What is the first step in solving for the part using the formula 'part = rate x base'?

• Divide the rate by the base

• Multiply the rate by the base

• Add the base to the rate

• Subtract the base from the rate

If a friend sells 80% of 25 t-shirts, how many did they sell?

• 30

• 25

• 20

• 15

What is the purpose of multiplying both sides by the base in the formula 'rate = part / base'?

• To simplify the equation

• To solve for the base

• To solve for the part

• To solve for the rate

What is the next step after converting a percentage to a decimal?

• Subtract the base

• Add the base

• Divide by the base

• Multiply by the base