Equivalent ratios and ratios

A student has 35 pens. Sixteen of the pens are blue and the rest are red. What is the ratio of red pens to blue pens?

• 19:16

• 16:19

• 35:16

• 16:35

What is the ratio of red apples to green apples

• 7 to 3

• 4 to 7

• 4 to 3

• 3 to 4

What is a Ratio?

• Is a comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

Kelly has 10 apps on her iPad. 5 are school apps, 2 are music apps, and 3 are games. What is the ratio of school apps to game apps?

• 5 to 2
• 3 to 5
• 5 to 10
• 5 to 3

Which ratios are equivalent to 1 : 3? Select all that apply (2).

• 10 : 30

• 6 : 18

• 5 : 20

• 2 : 9

Are these ratios equivalent to each other?

• Yes

• No

Use the shapes in the picture to write the ratio of STARS to SQUARES.

• 3 to 2

• 2 to 4

• 4 to 2

• 3 to 4

Find one equivalent ratio for 15 : 30

• 7 : 15

• 5 : 10

• 3 : 5

• 5 : 3

How can we find equivalent ratios? ( choose 2 answers )

• Adding

• Dividing

• Subtracting

• Multiplying

Find one equivalent ratio for 5 : 8

• 10 : 24

• 15 : 24

• 15 : 16

• 10 : 12