Ratio and Proportions and Geometry

Simplify the ratio of

20 to 25

• 1 to 5

• 2 to 5

• 3 to 5

• 4 to 5

Write the ratio in simplest form.  Don't forget to make sure that you have the same units!
50 seconds: 2 minutes

• 50:2
• 25:1
• 50:120
• 5:12

Express the ratio as a fraction in simplest form:

18 ounces to 3 cups

• 3 to 4

• 6 to 1

• 18 to 3

• 1 to 6

Simplify the following ratio: 2 miles to 2640 feet

• 2:1

• 1:2

• 4:1

• 5:1

There are 80 students in Mr. Bass’ classes.  The ratio of boys to girls is 2 : 3.
How many boys are in the classes?
How many girls?

• Boys: 32
  Girls: 48
• Boys: 48
  Girls: 32
• Boys: 5
  Girls: 15
• Boys: 15
  Girls: 5

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk
• 1.75 cups milk
• 2 cups flour
• 2.25 cups milk

Mr. Rowley has 16 homework paper and 14 exit tickets to return.  Ms Rivera has 64 homework papers and 60 exit tickets to return.  For each teacher. write a ratio of the homework to the exit tickets.  Are they equivalent?

• yes, the ratios are both 8 to 7.
• yes, the ratios are both 16 to 15 
• No, they are not equivalent

A model of a lighthouse has diameter 8 inches and height 18 inches. If the actual diameter of the lighthouse is 20 feet, find its actual height.

• 30 ft

• 35 ft

• 45 ft

• 50 ft

A scale drawing of a billboard uses the scale 4 cm:9 ft. The length of the billboard in the drawing is 11 cm. How long is the actual billboard?

• 13 ft
• 20.75 ft
• 24.75 ft
• 22 ft

Solve for a

• 29/12
• 41/12
• 107/12
• 13