7.55 as a common fraction would be 7 11/20, because 0.55 as a fraction is 55/100, which, when you divide by 5, can be simplified to 11/20, which you can then put next to the 7. 7.55 as a whole number would be 8, because you need to round and since the first decimal place is 5, you round upwards and get 8.
