Rations and Proportions

What is a Ratio?

• A comparison of two quantities 

• To multiply two fractions 

• A number over another number

• Two decimals that can be multiplied

Write a ratio in simplest form:
10 automobiles to 13 bikes

• 1/3

• 10/13

• 4/5

• 3/1

Is this proportion equal?
2/7     24/86

• =

• ≠

Is this proportion equal?
1/3     4/12

• =

• ≠

Is this proportion equal?
4/5  20/25

• =

• ≠

Solve:
7/n  =  14/10

• 5

• 7

• 70

• 4

Solve:
11/13  =  n/39

• 33

• 3

• 25

• 9

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

Tommy has a bag of LEGOS.  There are 6 yellow, 3 red, and 8 blue LEGOS.  What is the ratio in simplest form of red to yellow LEGOS?

• 1/2

• 6/3

• 2/1

• 3/6

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