Ratios

Which of these is the definition (meaning) of ratio?

• A ratio is an amount out of 100.

• A ratio is a number that only has 2 factors.

• A ratio is a comparison of two or more quantities.

Which of these is NOT a way to write a ratio?

• 2 : 3

• 3 to 2

• 3 = 2

Complete the problem:

2 : 3 = 8 : ____

• 12

• 4

• 16

Complete the problem:

6 : 18 = ____: 3

• 2

• 1

• 3

Reduce 15: 20 to its lowest terms.

• 3: 4

• 5: 4

• 1: 3

In a class there are 2 boys for every 5 girls. If there are 12 total boys, how many total girls are there?

• 6

• 24

• 30

There are 30 M&Ms in a bag. The ratio of red to yellow M&Ms is 3:2. How many red M&Ms are there in the bag?

• 30

• 18

• 12

A crate of soft drinks brings in 24. The ratio of Cokes to Fanta is 1:5. How many cokes are in the crate?

• 1

• 6

• 4

A ratio can be written in words, using a colon and as a ________.

• fraction

• percentage

• decimal

Which of these is NOT an equivalent ratio?

• 2: 3 = 4: 8

• 2: 3= 6 : 9

• 2 : 3 = 14 : 21