Ratios and Proportions

There are 675 students and 30 teachers in the middle school.  What is the ratio of teachers to students.

• 45/2
• 2/45
• 1/27
• 27/1

Which ratio is proportional to the ratio  1/5?

• 2/5
• 2/10
• 5/1
• 15/20

Which ratio below is proportional to the ratio   5/6?

• 6/5
• 50/75
• 25/30
• 12/10

Are the two ratios proportional?

• YES
• NO

Are the two ratios proportional?

• YES
• NO

What is a proportion?

• When two ratios can be simplified
• When two ratios are equivalent and show the same value
• When two ratios have the exact same numbers
• When two ratios can be multiplied by 2

Are the two ratios proportional?

• Yes
• No

What is the simplest form of 8/16?

• 1.2
• 1/2
• 2/1
• 1/.2

Does 4/5 = 20/25?

• Yes
• No
• I don't know
• We won't need to know this stuff

What is an equivalent ratio to 3/4?

• 1/4
• 4/5
• 12/16
• 14/18