Depending on your book there are either 8 or 9 planets. If it's an older book it counts Pluto as a planet and if it's newer it doesn't. Hope this helped!
Answer: 19/2 Step-by-step explanation : U divide the numerator and the denominator by the same number which is 3 57 divided by 3 = 19 6 divid by 3 = 2 So the answer is 19/2
