How would I do this? Do I need to get them into the sames type of money like pennies? I am lost!

7 dimes to 3 quaters??

they were probably asking for the ratio of 7 dimes to 3 quarters.
which is 70 cents:75 cents
which is 14:15 as a ration of "value"

2 answers

5/6- 1/6
2 litres:1000 litres