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[Math 5] - Percentage exercises

Cập nhật: 26/2/2021 | 6:30:11 PM

Percentage exercises appear in many ways in life. Here are the basic exercises for you to get acquainted, review your knowledge. Definition: percent (phần trăm), percentage (tỉ số phần trăm)

⚡ 3.1. 20% of a number equals 9.5. What is the number?

⚡ 3.2. In a regular Math test, 72.5% of class 5A students got Excellent score, 20% got Good score and the other 3 students got Average score. How many students got Excellent score?

⚡ 3.3. 57.5% of class 5E students are girls. The number of boys has 6 students less than that of girls. How many students are there in class 5E?

⚡ 3.4. In semester I, 90% of students got Good score. The principal thought that if 45 more students got Good score, there would be 95% of students getting Good score. How many students got Good score in semester I?

⚡ 3.5. Cube A has its side equal 2 times of the side of cube B. Find the percentage between cube B’s total surface area and cube A’s

⚡ 3.6. In order to increase the volume of a cuboid tank, people increase the length of the tank and keep the width and the height unchanged. The area of the base increases by 75% and the tank can contain 1500 more liters of water. Find the volume of the tank before change?

⚡ 3.7. 55% of students in a school are boys. The number of boys is 120 more than that of girls. How many students in the school?

⚡ 3.8. In an event, a shop discounted a phone’s price by 10% and still got 8% profit. If the shop had not discounted the phone’s price, how much would the profit have been?

⚡ 3.9. In 3 days, a group of workers fixed a road of 3km50m. On day 1, the group fixed 30% of the road, on day 2, the group fixed 45% of the road. What is the length of the road did the group fix on day 3?

⚡ 3.10. If the length of a rectangle increases by 25%, how many percent does the width decrease so that the area is unchanged?

♻  The practice exercises on decimals: HERE

Hope they will actively study to achieve the best results.

During the practice, you have any questions, you can inbox or join an online class with Teacher Minh Tuyen.

(Nguồn Tin: Casestudy24h)

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