On my science test I got 76 out of 100 because I got 7 problems wrong.Is it right?Should have I got a different score?
It depends on how many questions there were on the test.
There were 25 questions.
Well I calculated a grade of 72 either there were bonus questions or he/she gave you extra points
You got 18 correct....so 18/25 = 72%......so.....you actually got a better grade....!!!
+20 
