Ratio Proportion
Ratio with recipes
Scale ingredients up and down while keeping the same taste.
Quick answer
You can use ratio with recipes to make the right amount of food by keeping the same taste, whether you're cooking for one person or a whole family.Learning outcome
By the end of this page, you will be able to change a recipe's ingredients using ratio so that it still tastes the same, no matter how many people you are cooking for. Success signs:- You can identify the ingredients in a recipe and how they relate to each other
- You can use simple multiplication or division to change the amounts
- You can explain why the recipe still tastes the same when you change the amounts
- You can work out how much of each ingredient you need for a different number of people
Why this matters
Ratio helps you make the right amount of food, so it tastes the same whether you're cooking for one person or a big family. It's like a magic rule that keeps your food tasting just right, no matter how much you cook. In the real world, you use ratio when:- Making a cake for 2 people or 10 people
- Sharing snacks with friends
- Building with LEGO blocks
- Playing with your toys
- Planning a party
How it works
Let's learn how to use ratio with recipes in simple steps: Step 1: Look at the recipe and find the ingredients and how much of each you need. Step 2: Decide how many people you want to cook for. This is your "scale factor." Step 3: Multiply or divide each ingredient by the scale factor to get the new amounts. Step 4: Check that your new amounts still keep the same taste by looking at the ratio of ingredients. Let's say you have a recipe for 4 people and you want to cook for 8 people. You need to double everything. If the recipe says 2 eggs for 4 people, you need 4 eggs for 8 people.Examples you can see
Let's imagine you're making a simple pancake recipe for 4 people:| Ingredient | Amount |
|---|---|
| Flour | 200g |
| Eggs | 2 |
| Milk | 200ml |
| Butter | 20g |
| Ingredient | Amount |
|---|---|
| Flour | 400g |
| Eggs | 4 |
| Milk | 400ml |
| Butter | 40g |
| Ingredient | Amount |
|---|---|
| Flour | 100g |
| Eggs | 1 |
| Milk | 100ml |
| Butter | 10g |
Try it as a mini adventure
Adventure: The Great Recipe Swap! You are the chef of a pizza restaurant, and you have a special recipe for 6 people. You need to make the same pizza for 12 people and 3 people. You must keep the same taste! Here's your recipe for 6 people:- 300g cheese
- 200g pepperoni
- 150g mushrooms
- 200g tomato sauce
- Cheese: ? g
- Pepperoni: ? g
- Mushrooms: ? g
- Tomato sauce: ? ml
- Cheese: ? g
- Pepperoni: ? g
- Mushrooms: ? g
- Tomato sauce: ? ml
Common mistakes
- Mistake: Forgetting to multiply or divide all ingredients by the same number.
Why it happens: Kids might only change one ingredient and forget the others.
Fix: Always check that you multiply or divide all ingredients by the same number. - Mistake: Thinking that if you double the amount of one ingredient, you must double everything else.
Why it happens: Confusion between "double" and "same ratio."
Fix: Make sure the ratio between ingredients stays the same, not just that you double one thing. - Mistake: Not checking if the recipe still tastes the same.
Why it happens: Kids focus on numbers and forget about taste.
Fix: Always ask yourself if the ingredients still mix well and taste right.
Parent and carer guide
Parents and carers can help children learn ratio with recipes by:- Choosing simple recipes with 3-4 ingredients that children can count and measure
- Letting children help measure ingredients and explain why they need to double or halve
- Using everyday items like fruit, vegetables, or snacks to practice ratio
- Playing the "ratio game" by asking "What if we need to make 3 times as much?"
- Encouraging children to explain their thinking when changing recipes
- Using kitchen scales and measuring cups to make it hands-on
- Letting children make mistakes and learn from them
- Reinforcing that the taste stays the same when the ratios are correct
- How much more do we need if we want to make 3 times as much?
- What happens if we make half the recipe?
- Can we change the recipe for 5 people?
Practice questions
- Recipe for 4 people: 100g flour, 2 eggs, 100ml milk. How much for 8 people?
Answer: 200g flour, 4 eggs, 200ml milk - Recipe for 6 people: 300g sugar, 150g butter, 300ml cream. How much for 3 people?
Answer: 150g sugar, 75g butter, 150ml cream - Recipe for 2 people: 50g chocolate, 100ml cream, 1 egg. How much for 4 people?
Answer: 100g chocolate, 200ml cream, 2 eggs - Recipe for 8 people: 400g rice, 200g meat, 100g vegetables. How much for 4 people?
Answer: 200g rice, 100g meat, 50g vegetables - Recipe for 3 people: 150g cheese, 100g ham, 50g olives. How much for 6 people?
Answer: 300g cheese, 200g ham, 100g olives
FAQ
What is ratio in a recipe?
Ratio in a recipe is the relationship between the ingredients. It tells you how much of each ingredient to use compared to the others.
Why do we use ratio with recipes?
We use ratio to make sure the food still tastes the same, no matter how much we cook. It keeps the right balance of ingredients.
Can I use ratio with any recipe?
Yes! Ratio works with any recipe where you want to make more or less food. It's especially useful for baking and cooking.
How do I know if I'm doing ratio correctly?
Check that all ingredients have been multiplied or divided by the same number. If the taste is still the same, you're doing it right!
What happens if I change the ratio?
If you change the ratio, your food might taste different. It could be too salty, too sweet, or not balanced at all.