Ratios and Proportions Big Ideas

To solve for missing info in a proportion statement you must first

• Cross multiply

• Divide everything

• Get rid of variables

• Guess

There are 4 trucks for every 5 cars in a parking lot. How many trucks and cars could be in the parking lot?

• 72 trucks and 73 cars

• 64 trucks and 80 cars

• 84 trucks and 100 cars

• 96 trucks and 110 cars

Simplify the ratio of 35 : 14

• 2:5

• 5:2

• 1/2

• not known

The cookie jar has six chocolate chip cookies and five oatmeal cookies. What is the ratio of oatmeal to chocolate chip cookies?

• 6:5

• 5:6

• 6:11

• 6:11

Solve for x

• x = 1/6

• x = 7

• x = 6

• x = 9

All of the following are proper representations of a ratio EXCEPT

• a/b

• a to b

• a:b

• a over b

If a class has 14 redheads, 8 brunettes, and 6 blondes- What is the REDUCED ratio of redheads to brunettes?

• 4:7

• 14:8

• 8:14

• 7:4

If a class has 14 redheads, 8 brunettes, and 6 blondes- What is the REDUCED ratio of blondes to brunettes?

• 3:4

• 8:6

• 6:8

• 4:3

Write a ratio in simplest form:
8 students to 18 tables

• 4/9

• 8/18

• 9/4

• 4/5

Solve:
5/15  =  25/n

• 5

• 50

• 75

• 25