Comparing Proportions

How much further per hour does that person ride?

How many more per day are they selling?

Who sails faster?

• Brianna

• Alexius

What is a proportion?

• Comparing 2 numbers

• 2 ratios that are equal

• a fraction

• 2 fractions that are equivalent

What is it called when you are solving for an unknown factor in a proportion?

• Cross Adding

• Cross Subtracting

• Cross Multiplying

• Cross Dividing

Are the following proportions equivalent?

1 : 2 = 2 : 4

• Yes

• No

Are the following proportions equivalent?

4 : 7 = 8 : 21

• Yes

• No

Are the following proportions equivalent?

9 : 12 = 27 : 36

• Yes

• No

Are the following proportions equivalent?

3 : 10 = 7 : 20

• Yes

• No

Are the following proportions equivalent?

• Yes

• No