Ratio and Proportion

The video tutorial explains the concept of ratios, starting with basic definitions and examples, such as the ratio of men to women in a club. It then progresses to more advanced ratio questions involving before and after scenarios, introducing the concept of a 'ratio jumper' to solve these problems. The tutorial also covers proportions, explaining how to solve them using cross multiplication. Throughout, practical examples are provided to illustrate the concepts, making it easier for students to understand and apply these mathematical principles.

In a birdwatching club, the ratio of men to women is 3 to 4. What fraction of the club members are women?

• 3/7

• 4/7

• 4/3

• 3/4

If there is 1 vegetarian for every 3 meat eaters, what percentage of the group is vegetarian?

• 75%

• 25%

• 33%

• 50%

In a club with 700 members, the ratio of men to women is 3 to 4. How many men are there?

• 300

• 400

• 350

• 250

At a convention with 1,000 people, there are 2 buyers for every 3 sellers. How many buyers are there?

• 600

• 300

• 500

• 400

In a proportion question, if there are 2 apples for every 5 oranges and there are 40 apples, how many oranges are there?

• 50

• 200

• 100

• 80

If 10 batteries cost $20, how much would 8 batteries cost?

• $16

• $18

• $20

• $14

What is the first step in solving a typical ratio question?

• Cross-multiply

• Divide the total

• Add up the parts

• Find the ratio jumper