Exploring the Fundamentals of Ratios

The video tutorial introduces the concept of ratios, explaining how they represent relationships between different parts of a system. It covers ratio notation, emphasizing the importance of order, and provides examples to illustrate these concepts. The tutorial also discusses how ratios relate to proportions and worth, and demonstrates converting proportions into fractions, decimals, and percentages. The video concludes with encouragement to continue learning and sharing knowledge.

What is a ratio?

• A way to count items

• A type of fraction

• A mathematical operation

• A method to represent the relationship between parts of a whole

How is the ratio of 3 trousers to 4 shirts written in ratio notation?

• 4:3

• 3:4

• 4/3

• 3/4

Why is the order of items important in ratios?

• It determines the total number of items

• It affects the relationship being represented

• It changes the value of the ratio

• It is not important

If you have 6 red pens and the ratio of red to blue pens is 2:3, how many blue pens do you have?

• 3

• 12

• 9

• 6

What does a ratio of 1:21 represent in terms of cost?

• 1 item costs 21 units

• 21 items cost 1 unit

• 1 item costs 1 unit

• 21 items cost 21 units

How can proportions be represented?

• Only as fractions

• Only as decimals

• As fractions, decimals, and percentages

• Only as percentages

What is the proportion of blue parts if 3 out of 8 parts are blue?

• 5/8

• 3/8

• 8/3

• 3/5

In a bag of 36 marbles, 20 are red and the rest are black. What is the ratio of red to black marbles?

• 16:20

• 20:16

• 20:36

• 16:36

How do you convert a proportion to a percentage?

• Multiply by 10

• Divide by 100

• Multiply by 100

• Divide by 10

What is the percentage of black marbles if 16 out of 36 marbles are black?

• 36%

• 16%

• 44.44%

• 55.56%