# Using Proportion to Adapt Recipes

In this worksheet, students must use proportion to adapt recipes.

Key stage:  KS 2

Curriculum topic:   Ratio and Proportion

Curriculum subtopic:   Solve Ratio Problems

Difficulty level:

### QUESTION 1 of 10

Here is a recipe for 12 flapjacks.

• 8 oz butter
• 6 oz sugar
• 6 oz porridge oats

To find the quantities needed for 8 flapjacks, we first find how much is needed for 1 flapjack.

For 1 flapjack, divide each quantity by 12.

You need
 8 12
=
 2 3
oz butter

 6 12
=
 1 2
oz sugar and
 1 2
oz oats.

For 8 flapjacks, multiply each of these quantities by 8.

You need
 2 3
× 8  =
 16 3
=  5
 1 3
oz butter

 1 2
× 8  =  4 oz sugar and 4 oz oats.

Alternatively, work out 8 ÷ 12 = 2/3, so find 2/3 of each quantity.

Here is a recipe for 8 pancakes.

• 4 oz butter
• 4 oz sugar
• 8 oz milk
• 4 eggs

What quantities would be needed for 16 pancakes?

(units of measurement are not shown)

 4 8 12 16 butter sugar milk eggs

Here is another recipe for 8 pancakes.

• 2 oz butter
• 4 oz sugar
• 8 oz milk
• 4 eggs

What quantities would be needed for 12 pancakes?

(units of measurement are not shown)

 3 8 6 12 butter sugar milk eggs

Here is a recipe for 8 pancakes.

• 2 oz butter
• 4 oz sugar
• 8 oz milk
• 4 eggs

What quantities would be needed for 6 pancakes?

(units of measurement are not shown)

 1½ 8 6 3 butter sugar milk eggs

Here is a recipe for 4 glasses of banana milk shake.

• 8 bananas
• 4 oz sugar
• 32 oz milk
• 8 scoops of ice cream

What quantities would be needed for 2 glasses of banana milk shake?

(units of measurement are not shown)

 4 8 16 2 bananas sugar milk scoops

Here is a recipe for 4 glasses of banana milk shake.

• 8 bananas
• 4 oz sugar
• 32 oz milk
• 8 scoops of ice cream

What quantities would be needed for 10 glasses of banana milk shake?

(units of measurement are not shown)

 20 10 40 80 bananas sugar milk scoops

Here is another recipe for 5 glasses of banana milk shake.

• 8 bananas
• 4 oz sugar
• 32 oz milk
• 20 scoops of ice cream

What quantities would be needed for 10 glasses of banana milk shake?

(units of measurement are not shown)

 8 16 40 48 64 bananas sugar milk scoops

Here is a recipe for 16 biscuits.

• 4 oz butter
• 4 oz sugar
• 8 oz porridge oats

What quantities in ozs would be needed for 8 biscuits?

(units of measurement are not shown)

 2 3 4 5 butter sugar porridge oats

Here is a recipe for 6 flapjacks.

• 6 oz butter
• 6 oz sugar
• 12 oz porridge oats

What quantities in ozs would be needed for 10 flapjacks?

(units of measurement are not shown)

 6 10 12 20 butter sugar porridge oats

Here is another recipe for 8 flapjacks.

• 4 oz butter
• 4 oz sugar
• 8 oz porridge oats

What quantities in ozs would be needed for 12 flapjacks?

(units of measurement are not shown)

 5 6 12 14 butter sugar porridge oats

Here is a recipe for 8 flapjacks.

• 4 oz butter
• 4 oz sugar
• 8 oz porridge oats

What quantities in ozs would be needed for 6 flapjacks?

(units of measurement are not shown)

 3 4 5 6 butter sugar porridge oats
• Question 1

Here is a recipe for 8 pancakes.

• 4 oz butter
• 4 oz sugar
• 8 oz milk
• 4 eggs

What quantities would be needed for 16 pancakes?

(units of measurement are not shown)

 4 8 12 16 butter sugar milk eggs
EDDIE SAYS
16 ÷ 8 = 2, so double all the quantities.
• Question 2

Here is another recipe for 8 pancakes.

• 2 oz butter
• 4 oz sugar
• 8 oz milk
• 4 eggs

What quantities would be needed for 12 pancakes?

(units of measurement are not shown)

 3 8 6 12 butter sugar milk eggs
EDDIE SAYS
12 ÷ 8 = 1.5, so multiply quantities by 1.5.
• Question 3

Here is a recipe for 8 pancakes.

• 2 oz butter
• 4 oz sugar
• 8 oz milk
• 4 eggs

What quantities would be needed for 6 pancakes?

(units of measurement are not shown)

 1½ 8 6 3 butter sugar milk eggs
EDDIE SAYS
6 ÷ 8 = ¾ so find ¾ of each quantity.
• Question 4

Here is a recipe for 4 glasses of banana milk shake.

• 8 bananas
• 4 oz sugar
• 32 oz milk
• 8 scoops of ice cream

What quantities would be needed for 2 glasses of banana milk shake?

(units of measurement are not shown)

 4 8 16 2 bananas sugar milk scoops
EDDIE SAYS
2 ÷ 4 = ½, so divide each quantity by 2.
• Question 5

Here is a recipe for 4 glasses of banana milk shake.

• 8 bananas
• 4 oz sugar
• 32 oz milk
• 8 scoops of ice cream

What quantities would be needed for 10 glasses of banana milk shake?

(units of measurement are not shown)

 20 10 40 80 bananas sugar milk scoops
EDDIE SAYS
10 ÷ 4 = 2½, so multiply quantities by 2½.
• Question 6

Here is another recipe for 5 glasses of banana milk shake.

• 8 bananas
• 4 oz sugar
• 32 oz milk
• 20 scoops of ice cream

What quantities would be needed for 10 glasses of banana milk shake?

(units of measurement are not shown)

 8 16 40 48 64 bananas sugar milk scoops
EDDIE SAYS
10 ÷ 5 = 2, so double the quantities.
• Question 7

Here is a recipe for 16 biscuits.

• 4 oz butter
• 4 oz sugar
• 8 oz porridge oats

What quantities in ozs would be needed for 8 biscuits?

(units of measurement are not shown)

 2 3 4 5 butter sugar porridge oats
EDDIE SAYS
8 ÷ 16 = ½, so halve the quantities.
• Question 8

Here is a recipe for 6 flapjacks.

• 6 oz butter
• 6 oz sugar
• 12 oz porridge oats

What quantities in ozs would be needed for 10 flapjacks?

(units of measurement are not shown)

 6 10 12 20 butter sugar porridge oats
EDDIE SAYS
Each flapjack requires 1 oz butter, 1 oz sugar and 2 oz porridge oats.
• Question 9

Here is another recipe for 8 flapjacks.

• 4 oz butter
• 4 oz sugar
• 8 oz porridge oats

What quantities in ozs would be needed for 12 flapjacks?

(units of measurement are not shown)

 5 6 12 14 butter sugar porridge oats
EDDIE SAYS
12 ÷ 8 = 1½, so multiply quantities by 1½.
• Question 10

Here is a recipe for 8 flapjacks.

• 4 oz butter
• 4 oz sugar
• 8 oz porridge oats

What quantities in ozs would be needed for 6 flapjacks?

(units of measurement are not shown)

 3 4 5 6 butter sugar porridge oats
EDDIE SAYS
6 ÷ 8 = ¾, so find ¾ of each quantity.
---- OR ----

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