Real-World Applications of Percentages

The video tutorial covers various mathematical concepts including calculating unit rates for recipes, determining percent error in measurements, finding the length of a truck based on a car's length, calculating running speed, determining sale prices after discounts, computing commission and markup percentages, and solving a bonus problem. Each section provides step-by-step explanations and alternative methods for solving the problems.

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

Diego measured a pin to be 22 cm, but its actual length is 23 cm. What is the percent error in his measurement?

• 5.21%

• 2.17%

• 3.45%

• 4.34%

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

• 225 inches

• 270 inches

• 315 inches

• 360 inches

A t-shirt costs $18 before a 20% discount. What is the price after the discount?

• $17.10

• $16.20

• $15.00

• $14.40

Liam's father uses a 15% off coupon on a $20 meal. After applying a 7% sales tax, what is the total cost?

• $17.00

• $20.00

• $19.00

• $18.19

A store sells a product for $80 after a 20% discount. What was the original price?

• $120

• $100

• $90

• $110

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

• $27.50

• $25.00

• $22.50

• $20.00

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

• 50%

• 60%

• 70%

• 80%

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

• $12.80

• $12.70

• $12.60

• $12.50

A meal costs $28 before tax and tip. If the tax rate is 9% and the tip is 10%, what is the total cost?

• $33.52

• $32.52

• $31.52

• $30.52