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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 5.1 | Definition of Percentages |
1. . 12% of a sample of 550 people interviewed refused to answer the questions. How many people agreed to answer the questions?
Correct Answer: D
2. . 55% of a company staff are women. The total number of staff in that company is 320. How many women are working in the company?
Correct Answer: A
3. . 5% of 1800 items produced in a factory are defective and after a reparation process, 60% of the defective items are corrected and sent for sale. How many items are actually in market?
Correct Answer: D
4. . 46 out of 115 families living in a building are owners of their apartments. What percent of resident families are owners of their apartments?
Correct Answer: B
5. . In a box containing 80 balls, 25% are red, 10% are blue and the rest are white. How many white balls are there in the box?
Correct Answer: C
6. . 90% of the registered users in an application had previously rated it with 5 stars but 25% of them changed their mind later because of bugs. What is the new percentage of 5-stars evaluations for the app?
Correct Answer: B
7. . 72% of a 10 million adults living in the country X have been registered to take the Covid-19 vaccine but later 16% of the entire population change their mind because of conspiracy theories. How many people are actually ready to take the vaccine?
Correct Answer: C
8. . What is 24% ÷ 12%?
Correct Answer: D
9. . What is 23% of 40% of 2000?
Correct Answer: D
10. . Which of the following numbers is the biggest?
Correct Answer: A
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