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This worksheet is about proportion.
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 |
|
= |
|
oz butter | ||||||||
|
= |
|
oz sugar and |
|
oz oats. |
For 8 flapjacks, multiply each of these quantities by 8.
| You need |
|
× 8 = |
|
= 5 |
|
oz butter | ||||||
|
× 8 = | 4 oz sugar and 4 oz oats. | ||||||||||
Alternatively, work out 8 ÷ 12 = 2/3, so find 2/3 of each quantity.
