Understand the terms numerator and denominator.

In a fraction $\frac{a}{b}$, $a$ is the numerator (the top number) and $b$ is the denominator (the bottom number).

• a) In $\frac{9}{12}$, the bottom number is 12. The blank is: In $\frac{9}{12}$, the denominator is 12.

• b) In $\frac{5}{18}$, the top number is 5. The blank is: In $\frac{5}{18}$, the numerator is 5.

• c) In $\frac{12}{47}$, the top number is 12. The blank is: In $\frac{12}{47}$, the numerator is 12.

• d) In $\frac{11}{25}$, the bottom number is 25. The blank is: In $\frac{11}{25}$, the denominator is 25.

Here are the completed blanks:

• a) In $\frac{9}{12}$, the $\boxed{\text{denominator}}$ is 12.
• b) In $\frac{5}{18}$, the $\boxed{\text{numerator}}$ is 5.
• c) In $\frac{12}{47}$, the numerator is $\boxed{12}$.
• d) In $\frac{11}{25}$, the denominator is $\boxed{25}$.