Give 5 problems with solution on percentage and rates?
Answer (1)
Problem 1:Problem: A store is having a 20% off sale on all items. If a shirt originally costs $25, what is the sale price of the shirt?Solution:Calculate the discount amount: $25 × 0.20 = $5Subtract the discount from the original price: $25 - $5 = $20Answer: The sale price of the shirt is $20.Problem 2:Problem: A student scored 80 out of 100 on a test. What percentage did the student score?Solution:Divide the score by the total possible points: 80/100 = 0.80Multiply by 100 to convert to a percentage: 0.80 × 100 = 80%Answer: The student scored 80%.Problem 3:Problem: A car travels 150 miles in 3 hours. What is the average speed of the car in miles per hour?Solution:Divide the total distance by the total time: 150 miles/3 hours = 50 miles per hourAnswer: The average speed of the car is 50 mph.Problem 4:Problem: A recipe calls for 2 cups of flour and yields 24 cookies. If you want to make 60 cookies, how much flour do you need?Solution:Find the flour-to-cookie ratio: 2 cups/24 cookies = 1/12 cup per cookieMultiply the ratio by the desired number of cookies: (1/12 cup/cookie) × 60 cookies = 5 cupsAnswer: You need 5 cups of flour.Problem 5:Problem: An investor puts $5,000 in an account that earns 5% interest per year. How much interest will they earn in one year?Solution:Multiply the principal amount by the interest rate: $5,000 × 0.05 = $250Answer: The investor will earn $250 in interest.
