Pls help idk what to put and pls explain

S-7< 3 i need answering this problem someone asap answer

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4