Question

Jada has a new puppy that weighs 9 pounds. The vet says that the puppy is now at about 20% of its adult weight. (a)What will be the adult weight of the puppy? (b)What will be 40% of the adult weight of the puppy? (c)What will be 80% of the adult weight of the puppy?

Answer 1

Answer:

• 45 pounds.

,

• 18 pounds

,

• 36 pounds

Explanation:

Part A

Let the adult weight of the puppy = w

20% of its adult weight = 9 pounds

$\implies20\%\times w=9$

Next, solve for w:

$\begin{gathered} \frac{20}{100}\times w=9 \\ 0.2w=9 \\ w=\frac{9}{0.2} \\ w=45\text{ pounds} \end{gathered}$

The adult weight of the puppy is 45 pounds.

Part B

40% of the adult weight of the puppy:

$\begin{gathered} =40\%\times45 \\ =\frac{40}{100}\times45 \\ =18\text{ pounds} \end{gathered}$

Part C

80% of the adult weight of the puppy:

$\begin{gathered} =80\%\times45 \\ =\frac{80}{100}\times45 \\ =36\text{ pounds} \end{gathered}$