Understanding Proportions with Mr. J

The video tutorial by Mr. J explains how to determine if two ratios form a proportion using equivalent fractions. It covers the concept of proportions, which are formed by equal or equivalent ratios, and provides two examples to illustrate the process. The first example checks if the ratios 6:8 and 7:12 are proportional, while the second example examines the ratios 2:10 and 5:25. The tutorial concludes with a summary of the steps involved in determining proportional ratios.

What is a proportion?

• A comparison of two different units

• A statement that two ratios are equal

• A type of fraction

• A method to solve equations

Tags

CCSS.7.RP.A.2A

How do you start checking if two ratios are proportional?

• By dividing the larger by the smaller

• By writing them in fractional form

• By converting them to percentages

• By adding the ratios

What is the least common multiple of 8 and 12?

• 16

• 24

• 32

• 48

Tags

CCSS.6.RP.A.3A

If 6:8 is equivalent to 18:24, what is 7:12 equivalent to?

• 12:24

• 14:24

• 21:24

• 18:24

Tags

CCSS.7.RP.A.2A

Are the ratios 6:8 and 7:12 proportional?

• No, they are not proportional

• They are equal

• Yes, they are proportional

• They are equivalent

What is the least common multiple of 10 and 25?

• 50

• 100

• 30

• 75

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

How do you make 10 the denominator 50?

• Multiply by 5

• Multiply by 4

• Multiply by 6

• Multiply by 3

Tags

CCSS.6.RP.A.3A

What is the equivalent ratio of 5:25 when the denominator is 50?

• 5:50

• 20:50

• 10:50

• 15:50

Tags

CCSS.7.RP.A.2A

Are the ratios 2:10 and 5:25 proportional?

• They are equivalent

• No, they are not proportional

• Yes, they are proportional

• They are equal

Tags

CCSS.7.RP.A.2A

What is the final step to determine if two ratios are proportional?

• Check if the equivalent fractions are the same

• Add the ratios together

• Convert them to decimals

• Subtract the smaller from the larger

Tags

CCSS.7.RP.A.2A