1. Numbers
Ratios

2. Numbers 1:1 Ratios are a way to divide up a whole quantity.
If we had £200 to share out between 2 people it could be split evenly, £100 each. This would be a ratio of?
1:1

3. For every £4 Dave gets, Carol gets £6.
Numbers
The person giving the £200 may want to give more to one person than the other.
For every £4 Dave gets, Carol gets £6.
This is a ratio of…..
To work out how much Dave and Carol are given the amount of money is divided by the total of the ratio.
4:6

4. Numbers 4:6 is a total of 10 (4+6) £200 is divided by 10 = £20
Dave’s share (4) is multiplied by £20
Carol’s share (6) is multiplied by £20
4x£20 = £80
6x£20 = £120

5. Numbers Divide £640 in the ratio 3:5 Step 1 Add the ratio numbers =
Divide the amount by the total ratio =
Step 3
Multiply each ratio by the divided amount =
3+5 = 8
£640 ÷ 8
= £80
3 x £80 = £240
5 x £80 = £400

6. Numbers Word Questions!!!
These are not hard, you just need to identify the ratio and the amount to be divided up.
A recipe for a cake requires 3 cups of flour, 2 cups of sugar and 1 cup of butter. How much flour will be needed to make a 480g cake?
Ratio =
Total quantity =
Quantity of Flour =
Flour 3: Sugar 2: Butter 1
3:2:1 = 6
480 ÷ 6 = 80
3x80g = 240g

7. Numbers
A driveway needs to be made from concrete in the ratio of 3 parts stone, 2 parts sand, 1 part cement. 24m3 of concrete is needed to make the driveway, how much of each is needed?