Percentage and Proportion Problems

This video tutorial covers the concept of percentages as a special type of ratio out of 100. It includes several examples to illustrate how to find the part or the whole in percent problems. The examples range from calculating class votes, science quiz scores, savings, and school survey results. The lesson emphasizes understanding the setup of proportions and the importance of reading problem wording carefully.

What is the percentage equivalent of the fraction 9/17?

• 52.94%

• 53.29%

• 54.12%

• 51.76%

If 9 out of 17 students used inappropriate language, what percentage did not?

• 48.24%

• 46.71%

• 45.88%

• 47.06%

John received 61% of the votes in an election with 300 voters. How many votes did he get?

• 183

• 180

• 186

• 190

Audrey scored 80% on a quiz by answering 12 questions correctly. How many questions were on the quiz?

• 16

• 20

• 18

• 15

Victoria saves 20% of her weekly earnings of $600. How much does she save each week?

• $150

• $180

• $120

• $100

In a survey, 44% of students chose pizza as their favorite lunch. If 264 students voted for pizza, how many students are there in total?

• 500

• 600

• 550

• 650

If 20% of a number is 50, what is the original number?

• 200

• 250

• 300

• 150

A store offers a 25% discount on a $200 item. What is the sale price?

• $180

• $175

• $160

• $150

If a population increases by 15% annually, what will be the population after one year if the current population is 1,000?

• 1,150

• 1,200

• 1,300

• 1,250

A car's value depreciates by 10% each year. If the car is currently worth $20,000, what will its value be after one year?

• $18,000

• $17,500

• $18,500

• $19,000