It's not as simple as that. In oder to get a score of a passing score, you have to get between 60-70% of the questions correct. What % you will need will depend on the difficulty of the exam you get. If you get a really hard exam, you need to get 60% correct to pass. If you get a easier version of the test, you will need close to 70% correct to pass. So, as far as Step 1 scoring goes, getting 7 out of 10 questiond right, does not mean your score is a 70%. It could be 60% or 80% or anything in between and beyond.