Calculations Using Ratios

What is the ratio of dogs to cats?

• 4 : 3

• 1 : 2

• 3 : 4

• 2 : 1

Write the following ratio in its simplest form

36 : 12

• 6 : 2

• 18 : 6

• 12 : 4

• 3 : 1

In an S1 class, the ratio of boys to girls is 2 : 3. If there are 14 boys, how many girls are there?

• 21

• 6

• 16

• 42

The ratio of flour to butter in a cake recipe is 4 :1.

If I have 50g of butter, how much flour do I need?

• 200kg

• 100g

• 200g

• 150g

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.3

CCSS.6.RP.A.2

The ratio of teachers to pupils in a school is 3 : 52.

If there are 90 teachers, how many pupils and teachers are there altogether?

• 1650

• 1660

• 1560

• 1690

The ratio of circles to triangles in a pattern in 5 : 4. If I have 35 circles, how many triangles to I need?

• 36

• 28

• 7

• 9

To make green paint, a decorator mixed blue and yellow paint in the ratio 3 : 4. If I have 6 litres of blue paint how much green paint can I make?

• 8 litres

• 7 litres

• 24 litres

• 14 litres

Andy, Craig and Jamie share sweets in the ratio 2 : 1 : 3.

If Jamie has 36 sweets, how many do Andy and Craig have?

• Andy 6, Craig 3

• Craig 24, Andy 12

• Andy 24, Craig 12

• Andy 18, Craig 9

Becky and David buy raffle tickets. Becky pays £6 and David pays £4.

They decide to share the tickets in a ratio. If Becky takes 36 tickets, how many did they buy altogether?

• 36

• 24

• 72

• 60

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.3

Ben, Bill and Bob share pencils in the ratio 4 : 2 : 3. If Ben has 16 pencils, how many pencils do Bill and Bob have?

• Bill 4, Bob 9

• Bill 8, Bob 12

• Bill 6, Bob 12

• Bill 8, Bob 14