The numerator is the top number in a fraction. It tells you how many parts you have or are talking about. In the fraction 3/4, the numerator is 3, meaning you have three parts out of four total parts.

Think of sharing a pizza cut into eight slices. If you eat five slices, the fraction of pizza you ate is 5/8. The numerator (5) tells you exactly how many slices you ate, while the bottom number, called the denominator, tells you how many slices the whole pizza was cut into.

The numerator is what changes when you take more or less of something. If your friend eats two more slices, the numerator goes up to 7 (making 7/8), because now seven slices are gone. The denominator stays 8 because the pizza was still cut into eight pieces to start with.

When you're reading a fraction aloud, you say the numerator first: “three-fourths” means 3/4. The numerator always sits on top, which makes sense since it's the number you're usually most interested in. It tells you the actual amount you're working with. Understanding numerators helps you compare fractions, add them together, and solve all sorts of practical problems involving parts of a whole.