A car travels 20km for each litre of petrol.
If one litre costs £1.19, how far will the car travel on £50 of petrol?
We start by cutting out the litres and writing the
question as a ratio:
| travel |
: |
cost |
|
| 20km |
: |
£1.19 |
|
| : | | |
| : | £50 | |
Again there is a blank row and we turn 1.19 into one,
then into the target number, 50.
| travel |
: |
cost |
|
| 20km |
: |
£1.19 |
|
| 20/1.19 | : | £1 | divide by 1.19 |
50x20/1.19
= 840km | : | £50 | times by 50 |
So the answer is 840km.