Okay, so the top numbers are how many pieces we have, and the bottom number is how many pieces there are, think of it like a pizza. If the pizza is cut into 8 slices and you have one slice, you have a smaller piece of pizza than one slice from a pizza that was only cut into 6 pieces, which is smaller than one slice from a pizza that was only cut into 3 pieces. The more pieces there are, the smaller the pieces are, so the bigger the bottom number is, the smaller the fraction is.