Maths percentage and Application

1. A jacket originally costs 120 dollars and is discounted by 18%. What is the sale price?

A. A) 98.4 dollars B. B) 99.6 dollars C. C) 100.2 dollars D. D) 101.4 dollars

Solution

Correct: A

Discount = 120 × 0.18 = 21.6 dollars. Sale price = 120 – 21.6 = 98.4 dollars.

2. A school fundraiser raised 2,500 dollars, which is 125% of the target amount. What was the target amount?

A. A) 1,500 dollars B. B) 1,800 dollars C. C) 2,000 dollars D. D) 2,200 dollars

Solution

Correct: C

If 2,500 = 125% of the target, then target = 2,500 ÷ 1.25 = 2,000 dollars.

3. A recipe calls for 350 grams of flour. If you increase the recipe by 30%, how many grams of flour are needed?

A. A) 425 grams B. B) 455 grams C. C) 475 grams D. D) 505 grams

Solution

Correct: B

Increase = 350 × 0.30 = 105 grams. Total = 350 + 105 = 455 grams.

4. A car’s value depreciates 12% each year. If its current value is 15,000 dollars, what was its value one year ago?

A. A) 16,500 dollars B. B) 17,045 dollars C. C) 17,500 dollars D. D) 18,000 dollars

Solution

Correct: B

Current value = previous × (1 – 0.12) = previous × 0.88. So previous = 15,000 ÷ 0.88 ≈ 17,045 dollars.

5. A student earned 78% on a test with 50 questions. How many questions did the student answer correctly?

A. A) 38 B. B) 39 C. C) 40 D. D) 41

Solution

Correct: B

Correct answers = 50 × 0.78 = 39 questions.

6. A town’s population grew from 8,000 to 9,200 over one year. What was the percent increase?

A. A) 12% B. B) 13% C. C) 15% D. D) 18%

Solution

Correct: C

Increase = 9,200 – 8,000 = 1,200. Percent increase = (1,200 ÷ 8,000) × 100 = 15%.

7. A store adds a 7% markup to a wholesale price of 45 dollars. What is the retail price?

A. A) 47.00 dollars B. B) 48.15 dollars C. C) 49.50 dollars D. D) 50.00 dollars

Solution

Correct: B

Markup = 45 × 0.07 = 3.15 dollars. Retail price = 45 + 3.15 = 48.15 dollars.

8. A bank offers 3.5% annual interest, compounded yearly. How much interest is earned on 2,000 dollars after one year?

A. A) 60 dollars B. B) 65 dollars C. C) 70 dollars D. D) 75 dollars

Solution

Correct: C

Interest = 2,000 × 0.035 = 70 dollars.

9. A marathon runner improves his time by 4% and now finishes in 3 hours 48 minutes. What was his original time?

A. A) 3 hours 52 minutes B. B) 3 hours 55 minutes C. C) 3 hours 57 minutes 30 seconds D. D) 4 hours 0 minutes

Solution

Correct: C

New time = 3 h 48 m = 228 minutes. This is 96% of the original time (100% – 4%). Original time = 228 ÷ 0.96 ≈ 237.5 minutes = 3 h 57 m 30 s.

10. In a class of 28 students, 60% are girls. How many girls are in the class?

A. A) 16 B. B) 17 C. C) 18 D. D) 19

Solution

Correct: B

Girls = 28 × 0.60 = 16.8, which rounds to 17 students (the only whole‑number answer that fits the percentage).

1. A jacket originally costs 120 dollars and is discounted by 18%. What is the sale price?

2. A school fundraiser raised 2,500 dollars, which is 125% of the target amount. What was the target amount?

3. A recipe calls for 350 grams of flour. If you increase the recipe by 30%, how many grams of flour are needed?

4. A car’s value depreciates 12% each year. If its current value is 15,000 dollars, what was its value one year ago?

5. A student earned 78% on a test with 50 questions. How many questions did the student answer correctly?

6. A town’s population grew from 8,000 to 9,200 over one year. What was the percent increase?

7. A store adds a 7% markup to a wholesale price of 45 dollars. What is the retail price?

8. A bank offers 3.5% annual interest, compounded yearly. How much interest is earned on 2,000 dollars after one year?

9. A marathon runner improves his time by 4% and now finishes in 3 hours 48 minutes. What was his original time?

10. In a class of 28 students, 60% are girls. How many girls are in the class?

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