Question

use the proportion p/100=a/b to solve the following problem for the unknown quantity. round your answer to the nearest hundredth if necessary

Answer 1

You have the following proportion given in the exercise:

$\frac{P}{100}=\frac{A}{B}$

Where "P" is the percent, "A" is the amount and "B" is the base.

In this case, you need to find the 25% of 50. Then, you can set up that:

$\begin{gathered} P=25 \\ B=50 \end{gathered}$

Then, "A" is the value you need to find.

Hence, substituting values into the proportion and solving for "A", you get:

$\begin{gathered} \frac{25}{100}=\frac{A}{50} \\ \\ \frac{25}{100}\cdot50=A \end{gathered}$$\begin{gathered} \frac{1250}{100}=A \\ \\ A=12.5 \end{gathered}$

Therefore, the answer is:

$12.5$