To write this fraction as a decimal, what you must do in this case is to divide 4 by 5. Doing the division we have: 4/5 = 0.8 answer: the fraction of home runs hit during the first half of the season as a decimal is 0.8
We assume the opposite and then get to a point where we get a false statement. That proves that the the opposite of the opposite (What we originally wanted to prove) is true.
