3 has been multiplied by 6 to make 18. Multiply the other two parts of the ratio by 6 to keep the same proportion. The equivalent ratio is 30 : 18 : 6. In a kitchen, the ratio of cups to plates is ...

Save guides, add subjects and pick up where you left off with your BBC account. An amount can be increased or decreased by a certain percentage to change its size. A reverse percentage problem ...