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

• 45 pounds.

,

• 18 pounds

,

• 36 pounds

Step-by-step explanation:

Part A

Let the adult weight of the puppy = w

20% of its adult weight = 9 pounds

`\implies20\%* w=9`

Next, solve for w:

`\begin{gathered} (20)/(100)* w=9 \\ 0.2w=9 \\ w=(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\%*45 \\ =(40)/(100)*45 \\ =18\text{ pounds} \end{gathered}`

Part C

80% of the adult weight of the puppy:

`\begin{gathered} =80\%*45 \\ =(80)/(100)*45 \\ =36\text{ pounds} \end{gathered}`