Calculating Discounts and Percentages

The video tutorial covers various math problems, including calculating unit rates for recipes, percent error in measurements, length calculations, running speed, sale prices after discounts, commission and markup percentages, and total dinner costs with tax and tip. Each section provides step-by-step solutions to these problems, emphasizing the use of mathematical operations and conversions.

If Priya uses 7.5 cups of flour to make 3 loaves of banana bread, how many loaves can Andre make with 15 cups of flour?

• 4 loaves

• 6 loaves

• 8 loaves

• 10 loaves

What is the percent error if a measurement is 22 cm but the actual length is 23 cm?

• 6.12%

• 5.21%

• 3.45%

• 4.34%

A car is 180 inches long. If a truck is 75% longer, what is the length of the truck?

• 225 inches

• 315 inches

• 270 inches

• 180 inches

If a t-shirt costs $18 and there is a 20% discount, what is the price after the discount?

• $16.20

• $15.00

• $14.40

• $13.60

What is the final price of a $20 meal after a 15% discount and a 7% sales tax?

• $19.00

• $16.85

• $17.50

• $18.19

If a hat's discounted price is $18 after a 20% discount, what was the original price?

• $22.50

• $24.00

• $21.00

• $20.00

Tyler's brother earns a 2.5% commission on $900 worth of sales. How much is his commission?

• $25.00

• $22.50

• $20.00

• $27.50

A store buys shoes for $50 and sells them for $80. What is the percent markup?

• 50%

• 60%

• 40%

• 70%

If Tyler's brother gets a 5% raise on his $12 per hour wage, what will his new hourly wage be?

• $12.60

• $12.75

• $13.00

• $12.50

What is the percent error if a graduated cylinder is measured at 7 ml but actually contains 7.5 ml?

• 6.7%

• 6.0%

• 7.1%

• 5.5%