Question

1. clare spent 50 minutes cooking dinner on friday night.

a on saturday night, it took clare 130% as much time to cook dinner as it did on friday night. how long did it take clare to cook dinner on saturday night?
b on sunday night, it took clare 80% as much time to cook dinner as it did on friday night. how long did it take clare to cook dinner on sunday night?

1. an electronics store usually sells 550 video games each month. determine each percentage.

a the store sold 99 games in the first week of the month. what percent of the sales for the month were in the first week?
b in the first three weeks of the month, the store sold 462 games. what percent of the monthly sales were in the first three weeks?
c during a different month, the store sold 660 games. what percent of the usual monthly sales is that?

1. a pair of shoes normally costs $80 and is on sale for 20% off. tyler says, “the shoes cost $20 less, which is $60.” is tyler correct? explain your thinking.

Explanation:

Problem 6a

Step1: Understand the percentage

130% of 50 minutes. Convert 130% to decimal: \(130\% = 1.3\)

Step2: Calculate the time

Multiply 50 by 1.3: \(50\times1.3 = 65\)

Step1: Understand the percentage

80% of 50 minutes. Convert 80% to decimal: \(80\% = 0.8\)

Step2: Calculate the time

Multiply 50 by 0.8: \(50\times0.8 = 40\)

Step1: Formula for percentage

Percentage = \(\frac{\text{Part}}{\text{Whole}}\times100\%\), here part is 99, whole is 550.

Step2: Calculate the percentage

\(\frac{99}{550}\times100\% = 0.18\times100\% = 18\%\)

Answer:

65 minutes

Problem 6b