Video narration
How can a fraction be bigger than one whole? Take one pizza, cut into four equal slices. Equal-sized slices matter: the denominator tells how many make one whole pizza, and the numerator tells how many slices you have. With three slices, you have three-fourths: fewer than the four needed for a whole. That's a proper fraction. Its numerator is smaller than its denominator, so it's less than one. A fraction isn't always less than one whole: reach four slices, and you have a whole pizza. Four-fourths is one whole; five-fourths is one pizza and one extra slice. They're improper fractions: their numerator is at least as large as their denominator, so they mean one or more wholes. Because the numerator counts slices: once you have at least as many as make one pizza, your fraction is one or more.