

 If a cake is cut into 8 pieces, 8 is the denominator even if you only eat 2 pieces.
If a cake is cut into 8 pieces, 8 is the denominator even if you only eat 2 pieces.
  1/5 of a pizza is less than 1/3 of the same pizza because 5 is a bigger denominator.
1/5 of a pizza is less than 1/3 of the same pizza because 5 is a bigger denominator.
  In the probability of 1/52 of drawing an ace from a deck, 52 is the denominator.
In the probability of 1/52 of drawing an ace from a deck, 52 is the denominator.